--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/CSP2/CSP2_env/env-d9b9114564458d9d-741b3de822f2aaca6c6caa4325c4afce/lib/python3.8/idlelib/pyshell.py	Tue Mar 18 16:23:26 2025 -0400
@@ -0,0 +1,1568 @@
+#! /usr/bin/env python3
+
+import sys
+if __name__ == "__main__":
+    sys.modules['idlelib.pyshell'] = sys.modules['__main__']
+
+try:
+    from tkinter import *
+except ImportError:
+    print("** IDLE can't import Tkinter.\n"
+          "Your Python may not be configured for Tk. **", file=sys.__stderr__)
+    raise SystemExit(1)
+
+# Valid arguments for the ...Awareness call below are defined in the following.
+# https://msdn.microsoft.com/en-us/library/windows/desktop/dn280512(v=vs.85).aspx
+if sys.platform == 'win32':
+    try:
+        import ctypes
+        PROCESS_SYSTEM_DPI_AWARE = 1
+        ctypes.OleDLL('shcore').SetProcessDpiAwareness(PROCESS_SYSTEM_DPI_AWARE)
+    except (ImportError, AttributeError, OSError):
+        pass
+
+import tkinter.messagebox as tkMessageBox
+if TkVersion < 8.5:
+    root = Tk()  # otherwise create root in main
+    root.withdraw()
+    from idlelib.run import fix_scaling
+    fix_scaling(root)
+    tkMessageBox.showerror("Idle Cannot Start",
+            "Idle requires tcl/tk 8.5+, not %s." % TkVersion,
+            parent=root)
+    raise SystemExit(1)
+
+from code import InteractiveInterpreter
+import linecache
+import os
+import os.path
+from platform import python_version
+import re
+import socket
+import subprocess
+from textwrap import TextWrapper
+import threading
+import time
+import tokenize
+import warnings
+
+from idlelib.colorizer import ColorDelegator
+from idlelib.config import idleConf
+from idlelib import debugger
+from idlelib import debugger_r
+from idlelib.editor import EditorWindow, fixwordbreaks
+from idlelib.filelist import FileList
+from idlelib.outwin import OutputWindow
+from idlelib import rpc
+from idlelib.run import idle_formatwarning, StdInputFile, StdOutputFile
+from idlelib.undo import UndoDelegator
+
+HOST = '127.0.0.1' # python execution server on localhost loopback
+PORT = 0  # someday pass in host, port for remote debug capability
+
+# Override warnings module to write to warning_stream.  Initialize to send IDLE
+# internal warnings to the console.  ScriptBinding.check_syntax() will
+# temporarily redirect the stream to the shell window to display warnings when
+# checking user's code.
+warning_stream = sys.__stderr__  # None, at least on Windows, if no console.
+
+def idle_showwarning(
+        message, category, filename, lineno, file=None, line=None):
+    """Show Idle-format warning (after replacing warnings.showwarning).
+
+    The differences are the formatter called, the file=None replacement,
+    which can be None, the capture of the consequence AttributeError,
+    and the output of a hard-coded prompt.
+    """
+    if file is None:
+        file = warning_stream
+    try:
+        file.write(idle_formatwarning(
+                message, category, filename, lineno, line=line))
+        file.write(">>> ")
+    except (AttributeError, OSError):
+        pass  # if file (probably __stderr__) is invalid, skip warning.
+
+_warnings_showwarning = None
+
+def capture_warnings(capture):
+    "Replace warning.showwarning with idle_showwarning, or reverse."
+
+    global _warnings_showwarning
+    if capture:
+        if _warnings_showwarning is None:
+            _warnings_showwarning = warnings.showwarning
+            warnings.showwarning = idle_showwarning
+    else:
+        if _warnings_showwarning is not None:
+            warnings.showwarning = _warnings_showwarning
+            _warnings_showwarning = None
+
+capture_warnings(True)
+
+def extended_linecache_checkcache(filename=None,
+                                  orig_checkcache=linecache.checkcache):
+    """Extend linecache.checkcache to preserve the <pyshell#...> entries
+
+    Rather than repeating the linecache code, patch it to save the
+    <pyshell#...> entries, call the original linecache.checkcache()
+    (skipping them), and then restore the saved entries.
+
+    orig_checkcache is bound at definition time to the original
+    method, allowing it to be patched.
+    """
+    cache = linecache.cache
+    save = {}
+    for key in list(cache):
+        if key[:1] + key[-1:] == '<>':
+            save[key] = cache.pop(key)
+    orig_checkcache(filename)
+    cache.update(save)
+
+# Patch linecache.checkcache():
+linecache.checkcache = extended_linecache_checkcache
+
+
+class PyShellEditorWindow(EditorWindow):
+    "Regular text edit window in IDLE, supports breakpoints"
+
+    def __init__(self, *args):
+        self.breakpoints = []
+        EditorWindow.__init__(self, *args)
+        self.text.bind("<<set-breakpoint-here>>", self.set_breakpoint_here)
+        self.text.bind("<<clear-breakpoint-here>>", self.clear_breakpoint_here)
+        self.text.bind("<<open-python-shell>>", self.flist.open_shell)
+
+        #TODO: don't read/write this from/to .idlerc when testing
+        self.breakpointPath = os.path.join(
+                idleConf.userdir, 'breakpoints.lst')
+        # whenever a file is changed, restore breakpoints
+        def filename_changed_hook(old_hook=self.io.filename_change_hook,
+                                  self=self):
+            self.restore_file_breaks()
+            old_hook()
+        self.io.set_filename_change_hook(filename_changed_hook)
+        if self.io.filename:
+            self.restore_file_breaks()
+        self.color_breakpoint_text()
+
+    rmenu_specs = [
+        ("Cut", "<<cut>>", "rmenu_check_cut"),
+        ("Copy", "<<copy>>", "rmenu_check_copy"),
+        ("Paste", "<<paste>>", "rmenu_check_paste"),
+        (None, None, None),
+        ("Set Breakpoint", "<<set-breakpoint-here>>", None),
+        ("Clear Breakpoint", "<<clear-breakpoint-here>>", None)
+    ]
+
+    def color_breakpoint_text(self, color=True):
+        "Turn colorizing of breakpoint text on or off"
+        if self.io is None:
+            # possible due to update in restore_file_breaks
+            return
+        if color:
+            theme = idleConf.CurrentTheme()
+            cfg = idleConf.GetHighlight(theme, "break")
+        else:
+            cfg = {'foreground': '', 'background': ''}
+        self.text.tag_config('BREAK', cfg)
+
+    def set_breakpoint(self, lineno):
+        text = self.text
+        filename = self.io.filename
+        text.tag_add("BREAK", "%d.0" % lineno, "%d.0" % (lineno+1))
+        try:
+            self.breakpoints.index(lineno)
+        except ValueError:  # only add if missing, i.e. do once
+            self.breakpoints.append(lineno)
+        try:    # update the subprocess debugger
+            debug = self.flist.pyshell.interp.debugger
+            debug.set_breakpoint_here(filename, lineno)
+        except: # but debugger may not be active right now....
+            pass
+
+    def set_breakpoint_here(self, event=None):
+        text = self.text
+        filename = self.io.filename
+        if not filename:
+            text.bell()
+            return
+        lineno = int(float(text.index("insert")))
+        self.set_breakpoint(lineno)
+
+    def clear_breakpoint_here(self, event=None):
+        text = self.text
+        filename = self.io.filename
+        if not filename:
+            text.bell()
+            return
+        lineno = int(float(text.index("insert")))
+        try:
+            self.breakpoints.remove(lineno)
+        except:
+            pass
+        text.tag_remove("BREAK", "insert linestart",\
+                        "insert lineend +1char")
+        try:
+            debug = self.flist.pyshell.interp.debugger
+            debug.clear_breakpoint_here(filename, lineno)
+        except:
+            pass
+
+    def clear_file_breaks(self):
+        if self.breakpoints:
+            text = self.text
+            filename = self.io.filename
+            if not filename:
+                text.bell()
+                return
+            self.breakpoints = []
+            text.tag_remove("BREAK", "1.0", END)
+            try:
+                debug = self.flist.pyshell.interp.debugger
+                debug.clear_file_breaks(filename)
+            except:
+                pass
+
+    def store_file_breaks(self):
+        "Save breakpoints when file is saved"
+        # XXX 13 Dec 2002 KBK Currently the file must be saved before it can
+        #     be run.  The breaks are saved at that time.  If we introduce
+        #     a temporary file save feature the save breaks functionality
+        #     needs to be re-verified, since the breaks at the time the
+        #     temp file is created may differ from the breaks at the last
+        #     permanent save of the file.  Currently, a break introduced
+        #     after a save will be effective, but not persistent.
+        #     This is necessary to keep the saved breaks synched with the
+        #     saved file.
+        #
+        #     Breakpoints are set as tagged ranges in the text.
+        #     Since a modified file has to be saved before it is
+        #     run, and since self.breakpoints (from which the subprocess
+        #     debugger is loaded) is updated during the save, the visible
+        #     breaks stay synched with the subprocess even if one of these
+        #     unexpected breakpoint deletions occurs.
+        breaks = self.breakpoints
+        filename = self.io.filename
+        try:
+            with open(self.breakpointPath, "r") as fp:
+                lines = fp.readlines()
+        except OSError:
+            lines = []
+        try:
+            with open(self.breakpointPath, "w") as new_file:
+                for line in lines:
+                    if not line.startswith(filename + '='):
+                        new_file.write(line)
+                self.update_breakpoints()
+                breaks = self.breakpoints
+                if breaks:
+                    new_file.write(filename + '=' + str(breaks) + '\n')
+        except OSError as err:
+            if not getattr(self.root, "breakpoint_error_displayed", False):
+                self.root.breakpoint_error_displayed = True
+                tkMessageBox.showerror(title='IDLE Error',
+                    message='Unable to update breakpoint list:\n%s'
+                        % str(err),
+                    parent=self.text)
+
+    def restore_file_breaks(self):
+        self.text.update()   # this enables setting "BREAK" tags to be visible
+        if self.io is None:
+            # can happen if IDLE closes due to the .update() call
+            return
+        filename = self.io.filename
+        if filename is None:
+            return
+        if os.path.isfile(self.breakpointPath):
+            with open(self.breakpointPath, "r") as fp:
+                lines = fp.readlines()
+            for line in lines:
+                if line.startswith(filename + '='):
+                    breakpoint_linenumbers = eval(line[len(filename)+1:])
+                    for breakpoint_linenumber in breakpoint_linenumbers:
+                        self.set_breakpoint(breakpoint_linenumber)
+
+    def update_breakpoints(self):
+        "Retrieves all the breakpoints in the current window"
+        text = self.text
+        ranges = text.tag_ranges("BREAK")
+        linenumber_list = self.ranges_to_linenumbers(ranges)
+        self.breakpoints = linenumber_list
+
+    def ranges_to_linenumbers(self, ranges):
+        lines = []
+        for index in range(0, len(ranges), 2):
+            lineno = int(float(ranges[index].string))
+            end = int(float(ranges[index+1].string))
+            while lineno < end:
+                lines.append(lineno)
+                lineno += 1
+        return lines
+
+# XXX 13 Dec 2002 KBK Not used currently
+#    def saved_change_hook(self):
+#        "Extend base method - clear breaks if module is modified"
+#        if not self.get_saved():
+#            self.clear_file_breaks()
+#        EditorWindow.saved_change_hook(self)
+
+    def _close(self):
+        "Extend base method - clear breaks when module is closed"
+        self.clear_file_breaks()
+        EditorWindow._close(self)
+
+
+class PyShellFileList(FileList):
+    "Extend base class: IDLE supports a shell and breakpoints"
+
+    # override FileList's class variable, instances return PyShellEditorWindow
+    # instead of EditorWindow when new edit windows are created.
+    EditorWindow = PyShellEditorWindow
+
+    pyshell = None
+
+    def open_shell(self, event=None):
+        if self.pyshell:
+            self.pyshell.top.wakeup()
+        else:
+            self.pyshell = PyShell(self)
+            if self.pyshell:
+                if not self.pyshell.begin():
+                    return None
+        return self.pyshell
+
+
+class ModifiedColorDelegator(ColorDelegator):
+    "Extend base class: colorizer for the shell window itself"
+
+    def __init__(self):
+        ColorDelegator.__init__(self)
+        self.LoadTagDefs()
+
+    def recolorize_main(self):
+        self.tag_remove("TODO", "1.0", "iomark")
+        self.tag_add("SYNC", "1.0", "iomark")
+        ColorDelegator.recolorize_main(self)
+
+    def LoadTagDefs(self):
+        ColorDelegator.LoadTagDefs(self)
+        theme = idleConf.CurrentTheme()
+        self.tagdefs.update({
+            "stdin": {'background':None,'foreground':None},
+            "stdout": idleConf.GetHighlight(theme, "stdout"),
+            "stderr": idleConf.GetHighlight(theme, "stderr"),
+            "console": idleConf.GetHighlight(theme, "console"),
+        })
+
+    def removecolors(self):
+        # Don't remove shell color tags before "iomark"
+        for tag in self.tagdefs:
+            self.tag_remove(tag, "iomark", "end")
+
+class ModifiedUndoDelegator(UndoDelegator):
+    "Extend base class: forbid insert/delete before the I/O mark"
+
+    def insert(self, index, chars, tags=None):
+        try:
+            if self.delegate.compare(index, "<", "iomark"):
+                self.delegate.bell()
+                return
+        except TclError:
+            pass
+        UndoDelegator.insert(self, index, chars, tags)
+
+    def delete(self, index1, index2=None):
+        try:
+            if self.delegate.compare(index1, "<", "iomark"):
+                self.delegate.bell()
+                return
+        except TclError:
+            pass
+        UndoDelegator.delete(self, index1, index2)
+
+
+class MyRPCClient(rpc.RPCClient):
+
+    def handle_EOF(self):
+        "Override the base class - just re-raise EOFError"
+        raise EOFError
+
+def restart_line(width, filename):  # See bpo-38141.
+    """Return width long restart line formatted with filename.
+
+    Fill line with balanced '='s, with any extras and at least one at
+    the beginning.  Do not end with a trailing space.
+    """
+    tag = f"= RESTART: {filename or 'Shell'} ="
+    if width >= len(tag):
+        div, mod = divmod((width -len(tag)), 2)
+        return f"{(div+mod)*'='}{tag}{div*'='}"
+    else:
+        return tag[:-2]  # Remove ' ='.
+
+
+class ModifiedInterpreter(InteractiveInterpreter):
+
+    def __init__(self, tkconsole):
+        self.tkconsole = tkconsole
+        locals = sys.modules['__main__'].__dict__
+        InteractiveInterpreter.__init__(self, locals=locals)
+        self.restarting = False
+        self.subprocess_arglist = None
+        self.port = PORT
+        self.original_compiler_flags = self.compile.compiler.flags
+
+    _afterid = None
+    rpcclt = None
+    rpcsubproc = None
+
+    def spawn_subprocess(self):
+        if self.subprocess_arglist is None:
+            self.subprocess_arglist = self.build_subprocess_arglist()
+        self.rpcsubproc = subprocess.Popen(self.subprocess_arglist)
+
+    def build_subprocess_arglist(self):
+        assert (self.port!=0), (
+            "Socket should have been assigned a port number.")
+        w = ['-W' + s for s in sys.warnoptions]
+        # Maybe IDLE is installed and is being accessed via sys.path,
+        # or maybe it's not installed and the idle.py script is being
+        # run from the IDLE source directory.
+        del_exitf = idleConf.GetOption('main', 'General', 'delete-exitfunc',
+                                       default=False, type='bool')
+        command = "__import__('idlelib.run').run.main(%r)" % (del_exitf,)
+        return [sys.executable] + w + ["-c", command, str(self.port)]
+
+    def start_subprocess(self):
+        addr = (HOST, self.port)
+        # GUI makes several attempts to acquire socket, listens for connection
+        for i in range(3):
+            time.sleep(i)
+            try:
+                self.rpcclt = MyRPCClient(addr)
+                break
+            except OSError:
+                pass
+        else:
+            self.display_port_binding_error()
+            return None
+        # if PORT was 0, system will assign an 'ephemeral' port. Find it out:
+        self.port = self.rpcclt.listening_sock.getsockname()[1]
+        # if PORT was not 0, probably working with a remote execution server
+        if PORT != 0:
+            # To allow reconnection within the 2MSL wait (cf. Stevens TCP
+            # V1, 18.6),  set SO_REUSEADDR.  Note that this can be problematic
+            # on Windows since the implementation allows two active sockets on
+            # the same address!
+            self.rpcclt.listening_sock.setsockopt(socket.SOL_SOCKET,
+                                           socket.SO_REUSEADDR, 1)
+        self.spawn_subprocess()
+        #time.sleep(20) # test to simulate GUI not accepting connection
+        # Accept the connection from the Python execution server
+        self.rpcclt.listening_sock.settimeout(10)
+        try:
+            self.rpcclt.accept()
+        except socket.timeout:
+            self.display_no_subprocess_error()
+            return None
+        self.rpcclt.register("console", self.tkconsole)
+        self.rpcclt.register("stdin", self.tkconsole.stdin)
+        self.rpcclt.register("stdout", self.tkconsole.stdout)
+        self.rpcclt.register("stderr", self.tkconsole.stderr)
+        self.rpcclt.register("flist", self.tkconsole.flist)
+        self.rpcclt.register("linecache", linecache)
+        self.rpcclt.register("interp", self)
+        self.transfer_path(with_cwd=True)
+        self.poll_subprocess()
+        return self.rpcclt
+
+    def restart_subprocess(self, with_cwd=False, filename=''):
+        if self.restarting:
+            return self.rpcclt
+        self.restarting = True
+        # close only the subprocess debugger
+        debug = self.getdebugger()
+        if debug:
+            try:
+                # Only close subprocess debugger, don't unregister gui_adap!
+                debugger_r.close_subprocess_debugger(self.rpcclt)
+            except:
+                pass
+        # Kill subprocess, spawn a new one, accept connection.
+        self.rpcclt.close()
+        self.terminate_subprocess()
+        console = self.tkconsole
+        was_executing = console.executing
+        console.executing = False
+        self.spawn_subprocess()
+        try:
+            self.rpcclt.accept()
+        except socket.timeout:
+            self.display_no_subprocess_error()
+            return None
+        self.transfer_path(with_cwd=with_cwd)
+        console.stop_readline()
+        # annotate restart in shell window and mark it
+        console.text.delete("iomark", "end-1c")
+        console.write('\n')
+        console.write(restart_line(console.width, filename))
+        console.text.mark_set("restart", "end-1c")
+        console.text.mark_gravity("restart", "left")
+        if not filename:
+            console.showprompt()
+        # restart subprocess debugger
+        if debug:
+            # Restarted debugger connects to current instance of debug GUI
+            debugger_r.restart_subprocess_debugger(self.rpcclt)
+            # reload remote debugger breakpoints for all PyShellEditWindows
+            debug.load_breakpoints()
+        self.compile.compiler.flags = self.original_compiler_flags
+        self.restarting = False
+        return self.rpcclt
+
+    def __request_interrupt(self):
+        self.rpcclt.remotecall("exec", "interrupt_the_server", (), {})
+
+    def interrupt_subprocess(self):
+        threading.Thread(target=self.__request_interrupt).start()
+
+    def kill_subprocess(self):
+        if self._afterid is not None:
+            self.tkconsole.text.after_cancel(self._afterid)
+        try:
+            self.rpcclt.listening_sock.close()
+        except AttributeError:  # no socket
+            pass
+        try:
+            self.rpcclt.close()
+        except AttributeError:  # no socket
+            pass
+        self.terminate_subprocess()
+        self.tkconsole.executing = False
+        self.rpcclt = None
+
+    def terminate_subprocess(self):
+        "Make sure subprocess is terminated"
+        try:
+            self.rpcsubproc.kill()
+        except OSError:
+            # process already terminated
+            return
+        else:
+            try:
+                self.rpcsubproc.wait()
+            except OSError:
+                return
+
+    def transfer_path(self, with_cwd=False):
+        if with_cwd:        # Issue 13506
+            path = ['']     # include Current Working Directory
+            path.extend(sys.path)
+        else:
+            path = sys.path
+
+        self.runcommand("""if 1:
+        import sys as _sys
+        _sys.path = %r
+        del _sys
+        \n""" % (path,))
+
+    active_seq = None
+
+    def poll_subprocess(self):
+        clt = self.rpcclt
+        if clt is None:
+            return
+        try:
+            response = clt.pollresponse(self.active_seq, wait=0.05)
+        except (EOFError, OSError, KeyboardInterrupt):
+            # lost connection or subprocess terminated itself, restart
+            # [the KBI is from rpc.SocketIO.handle_EOF()]
+            if self.tkconsole.closing:
+                return
+            response = None
+            self.restart_subprocess()
+        if response:
+            self.tkconsole.resetoutput()
+            self.active_seq = None
+            how, what = response
+            console = self.tkconsole.console
+            if how == "OK":
+                if what is not None:
+                    print(repr(what), file=console)
+            elif how == "EXCEPTION":
+                if self.tkconsole.getvar("<<toggle-jit-stack-viewer>>"):
+                    self.remote_stack_viewer()
+            elif how == "ERROR":
+                errmsg = "pyshell.ModifiedInterpreter: Subprocess ERROR:\n"
+                print(errmsg, what, file=sys.__stderr__)
+                print(errmsg, what, file=console)
+            # we received a response to the currently active seq number:
+            try:
+                self.tkconsole.endexecuting()
+            except AttributeError:  # shell may have closed
+                pass
+        # Reschedule myself
+        if not self.tkconsole.closing:
+            self._afterid = self.tkconsole.text.after(
+                self.tkconsole.pollinterval, self.poll_subprocess)
+
+    debugger = None
+
+    def setdebugger(self, debugger):
+        self.debugger = debugger
+
+    def getdebugger(self):
+        return self.debugger
+
+    def open_remote_stack_viewer(self):
+        """Initiate the remote stack viewer from a separate thread.
+
+        This method is called from the subprocess, and by returning from this
+        method we allow the subprocess to unblock.  After a bit the shell
+        requests the subprocess to open the remote stack viewer which returns a
+        static object looking at the last exception.  It is queried through
+        the RPC mechanism.
+
+        """
+        self.tkconsole.text.after(300, self.remote_stack_viewer)
+        return
+
+    def remote_stack_viewer(self):
+        from idlelib import debugobj_r
+        oid = self.rpcclt.remotequeue("exec", "stackviewer", ("flist",), {})
+        if oid is None:
+            self.tkconsole.root.bell()
+            return
+        item = debugobj_r.StubObjectTreeItem(self.rpcclt, oid)
+        from idlelib.tree import ScrolledCanvas, TreeNode
+        top = Toplevel(self.tkconsole.root)
+        theme = idleConf.CurrentTheme()
+        background = idleConf.GetHighlight(theme, 'normal')['background']
+        sc = ScrolledCanvas(top, bg=background, highlightthickness=0)
+        sc.frame.pack(expand=1, fill="both")
+        node = TreeNode(sc.canvas, None, item)
+        node.expand()
+        # XXX Should GC the remote tree when closing the window
+
+    gid = 0
+
+    def execsource(self, source):
+        "Like runsource() but assumes complete exec source"
+        filename = self.stuffsource(source)
+        self.execfile(filename, source)
+
+    def execfile(self, filename, source=None):
+        "Execute an existing file"
+        if source is None:
+            with tokenize.open(filename) as fp:
+                source = fp.read()
+                if use_subprocess:
+                    source = (f"__file__ = r'''{os.path.abspath(filename)}'''\n"
+                              + source + "\ndel __file__")
+        try:
+            code = compile(source, filename, "exec")
+        except (OverflowError, SyntaxError):
+            self.tkconsole.resetoutput()
+            print('*** Error in script or command!\n'
+                 'Traceback (most recent call last):',
+                  file=self.tkconsole.stderr)
+            InteractiveInterpreter.showsyntaxerror(self, filename)
+            self.tkconsole.showprompt()
+        else:
+            self.runcode(code)
+
+    def runsource(self, source):
+        "Extend base class method: Stuff the source in the line cache first"
+        filename = self.stuffsource(source)
+        self.more = 0
+        # at the moment, InteractiveInterpreter expects str
+        assert isinstance(source, str)
+        # InteractiveInterpreter.runsource() calls its runcode() method,
+        # which is overridden (see below)
+        return InteractiveInterpreter.runsource(self, source, filename)
+
+    def stuffsource(self, source):
+        "Stuff source in the filename cache"
+        filename = "<pyshell#%d>" % self.gid
+        self.gid = self.gid + 1
+        lines = source.split("\n")
+        linecache.cache[filename] = len(source)+1, 0, lines, filename
+        return filename
+
+    def prepend_syspath(self, filename):
+        "Prepend sys.path with file's directory if not already included"
+        self.runcommand("""if 1:
+            _filename = %r
+            import sys as _sys
+            from os.path import dirname as _dirname
+            _dir = _dirname(_filename)
+            if not _dir in _sys.path:
+                _sys.path.insert(0, _dir)
+            del _filename, _sys, _dirname, _dir
+            \n""" % (filename,))
+
+    def showsyntaxerror(self, filename=None):
+        """Override Interactive Interpreter method: Use Colorizing
+
+        Color the offending position instead of printing it and pointing at it
+        with a caret.
+
+        """
+        tkconsole = self.tkconsole
+        text = tkconsole.text
+        text.tag_remove("ERROR", "1.0", "end")
+        type, value, tb = sys.exc_info()
+        msg = getattr(value, 'msg', '') or value or "<no detail available>"
+        lineno = getattr(value, 'lineno', '') or 1
+        offset = getattr(value, 'offset', '') or 0
+        if offset == 0:
+            lineno += 1 #mark end of offending line
+        if lineno == 1:
+            pos = "iomark + %d chars" % (offset-1)
+        else:
+            pos = "iomark linestart + %d lines + %d chars" % \
+                  (lineno-1, offset-1)
+        tkconsole.colorize_syntax_error(text, pos)
+        tkconsole.resetoutput()
+        self.write("SyntaxError: %s\n" % msg)
+        tkconsole.showprompt()
+
+    def showtraceback(self):
+        "Extend base class method to reset output properly"
+        self.tkconsole.resetoutput()
+        self.checklinecache()
+        InteractiveInterpreter.showtraceback(self)
+        if self.tkconsole.getvar("<<toggle-jit-stack-viewer>>"):
+            self.tkconsole.open_stack_viewer()
+
+    def checklinecache(self):
+        c = linecache.cache
+        for key in list(c.keys()):
+            if key[:1] + key[-1:] != "<>":
+                del c[key]
+
+    def runcommand(self, code):
+        "Run the code without invoking the debugger"
+        # The code better not raise an exception!
+        if self.tkconsole.executing:
+            self.display_executing_dialog()
+            return 0
+        if self.rpcclt:
+            self.rpcclt.remotequeue("exec", "runcode", (code,), {})
+        else:
+            exec(code, self.locals)
+        return 1
+
+    def runcode(self, code):
+        "Override base class method"
+        if self.tkconsole.executing:
+            self.interp.restart_subprocess()
+        self.checklinecache()
+        debugger = self.debugger
+        try:
+            self.tkconsole.beginexecuting()
+            if not debugger and self.rpcclt is not None:
+                self.active_seq = self.rpcclt.asyncqueue("exec", "runcode",
+                                                        (code,), {})
+            elif debugger:
+                debugger.run(code, self.locals)
+            else:
+                exec(code, self.locals)
+        except SystemExit:
+            if not self.tkconsole.closing:
+                if tkMessageBox.askyesno(
+                    "Exit?",
+                    "Do you want to exit altogether?",
+                    default="yes",
+                    parent=self.tkconsole.text):
+                    raise
+                else:
+                    self.showtraceback()
+            else:
+                raise
+        except:
+            if use_subprocess:
+                print("IDLE internal error in runcode()",
+                      file=self.tkconsole.stderr)
+                self.showtraceback()
+                self.tkconsole.endexecuting()
+            else:
+                if self.tkconsole.canceled:
+                    self.tkconsole.canceled = False
+                    print("KeyboardInterrupt", file=self.tkconsole.stderr)
+                else:
+                    self.showtraceback()
+        finally:
+            if not use_subprocess:
+                try:
+                    self.tkconsole.endexecuting()
+                except AttributeError:  # shell may have closed
+                    pass
+
+    def write(self, s):
+        "Override base class method"
+        return self.tkconsole.stderr.write(s)
+
+    def display_port_binding_error(self):
+        tkMessageBox.showerror(
+            "Port Binding Error",
+            "IDLE can't bind to a TCP/IP port, which is necessary to "
+            "communicate with its Python execution server.  This might be "
+            "because no networking is installed on this computer.  "
+            "Run IDLE with the -n command line switch to start without a "
+            "subprocess and refer to Help/IDLE Help 'Running without a "
+            "subprocess' for further details.",
+            parent=self.tkconsole.text)
+
+    def display_no_subprocess_error(self):
+        tkMessageBox.showerror(
+            "Subprocess Connection Error",
+            "IDLE's subprocess didn't make connection.\n"
+            "See the 'Startup failure' section of the IDLE doc, online at\n"
+            "https://docs.python.org/3/library/idle.html#startup-failure",
+            parent=self.tkconsole.text)
+
+    def display_executing_dialog(self):
+        tkMessageBox.showerror(
+            "Already executing",
+            "The Python Shell window is already executing a command; "
+            "please wait until it is finished.",
+            parent=self.tkconsole.text)
+
+
+class PyShell(OutputWindow):
+
+    shell_title = "Python " + python_version() + " Shell"
+
+    # Override classes
+    ColorDelegator = ModifiedColorDelegator
+    UndoDelegator = ModifiedUndoDelegator
+
+    # Override menus
+    menu_specs = [
+        ("file", "_File"),
+        ("edit", "_Edit"),
+        ("debug", "_Debug"),
+        ("options", "_Options"),
+        ("window", "_Window"),
+        ("help", "_Help"),
+    ]
+
+    # Extend right-click context menu
+    rmenu_specs = OutputWindow.rmenu_specs + [
+        ("Squeeze", "<<squeeze-current-text>>"),
+    ]
+
+    allow_line_numbers = False
+
+    # New classes
+    from idlelib.history import History
+
+    def __init__(self, flist=None):
+        if use_subprocess:
+            ms = self.menu_specs
+            if ms[2][0] != "shell":
+                ms.insert(2, ("shell", "She_ll"))
+        self.interp = ModifiedInterpreter(self)
+        if flist is None:
+            root = Tk()
+            fixwordbreaks(root)
+            root.withdraw()
+            flist = PyShellFileList(root)
+
+        OutputWindow.__init__(self, flist, None, None)
+
+        self.usetabs = True
+        # indentwidth must be 8 when using tabs.  See note in EditorWindow:
+        self.indentwidth = 8
+
+        self.sys_ps1 = sys.ps1 if hasattr(sys, 'ps1') else '>>> '
+        self.prompt_last_line = self.sys_ps1.split('\n')[-1]
+        self.prompt = self.sys_ps1  # Changes when debug active
+
+        text = self.text
+        text.configure(wrap="char")
+        text.bind("<<newline-and-indent>>", self.enter_callback)
+        text.bind("<<plain-newline-and-indent>>", self.linefeed_callback)
+        text.bind("<<interrupt-execution>>", self.cancel_callback)
+        text.bind("<<end-of-file>>", self.eof_callback)
+        text.bind("<<open-stack-viewer>>", self.open_stack_viewer)
+        text.bind("<<toggle-debugger>>", self.toggle_debugger)
+        text.bind("<<toggle-jit-stack-viewer>>", self.toggle_jit_stack_viewer)
+        if use_subprocess:
+            text.bind("<<view-restart>>", self.view_restart_mark)
+            text.bind("<<restart-shell>>", self.restart_shell)
+        squeezer = self.Squeezer(self)
+        text.bind("<<squeeze-current-text>>",
+                  squeezer.squeeze_current_text_event)
+
+        self.save_stdout = sys.stdout
+        self.save_stderr = sys.stderr
+        self.save_stdin = sys.stdin
+        from idlelib import iomenu
+        self.stdin = StdInputFile(self, "stdin",
+                                  iomenu.encoding, iomenu.errors)
+        self.stdout = StdOutputFile(self, "stdout",
+                                    iomenu.encoding, iomenu.errors)
+        self.stderr = StdOutputFile(self, "stderr",
+                                    iomenu.encoding, "backslashreplace")
+        self.console = StdOutputFile(self, "console",
+                                     iomenu.encoding, iomenu.errors)
+        if not use_subprocess:
+            sys.stdout = self.stdout
+            sys.stderr = self.stderr
+            sys.stdin = self.stdin
+        try:
+            # page help() text to shell.
+            import pydoc # import must be done here to capture i/o rebinding.
+            # XXX KBK 27Dec07 use text viewer someday, but must work w/o subproc
+            pydoc.pager = pydoc.plainpager
+        except:
+            sys.stderr = sys.__stderr__
+            raise
+        #
+        self.history = self.History(self.text)
+        #
+        self.pollinterval = 50  # millisec
+
+    def get_standard_extension_names(self):
+        return idleConf.GetExtensions(shell_only=True)
+
+    reading = False
+    executing = False
+    canceled = False
+    endoffile = False
+    closing = False
+    _stop_readline_flag = False
+
+    def set_warning_stream(self, stream):
+        global warning_stream
+        warning_stream = stream
+
+    def get_warning_stream(self):
+        return warning_stream
+
+    def toggle_debugger(self, event=None):
+        if self.executing:
+            tkMessageBox.showerror("Don't debug now",
+                "You can only toggle the debugger when idle",
+                parent=self.text)
+            self.set_debugger_indicator()
+            return "break"
+        else:
+            db = self.interp.getdebugger()
+            if db:
+                self.close_debugger()
+            else:
+                self.open_debugger()
+
+    def set_debugger_indicator(self):
+        db = self.interp.getdebugger()
+        self.setvar("<<toggle-debugger>>", not not db)
+
+    def toggle_jit_stack_viewer(self, event=None):
+        pass # All we need is the variable
+
+    def close_debugger(self):
+        db = self.interp.getdebugger()
+        if db:
+            self.interp.setdebugger(None)
+            db.close()
+            if self.interp.rpcclt:
+                debugger_r.close_remote_debugger(self.interp.rpcclt)
+            self.resetoutput()
+            self.console.write("[DEBUG OFF]\n")
+            self.prompt = self.sys_ps1
+            self.showprompt()
+        self.set_debugger_indicator()
+
+    def open_debugger(self):
+        if self.interp.rpcclt:
+            dbg_gui = debugger_r.start_remote_debugger(self.interp.rpcclt,
+                                                           self)
+        else:
+            dbg_gui = debugger.Debugger(self)
+        self.interp.setdebugger(dbg_gui)
+        dbg_gui.load_breakpoints()
+        self.prompt = "[DEBUG ON]\n" + self.sys_ps1
+        self.showprompt()
+        self.set_debugger_indicator()
+
+    def beginexecuting(self):
+        "Helper for ModifiedInterpreter"
+        self.resetoutput()
+        self.executing = 1
+
+    def endexecuting(self):
+        "Helper for ModifiedInterpreter"
+        self.executing = 0
+        self.canceled = 0
+        self.showprompt()
+
+    def close(self):
+        "Extend EditorWindow.close()"
+        if self.executing:
+            response = tkMessageBox.askokcancel(
+                "Kill?",
+                "Your program is still running!\n Do you want to kill it?",
+                default="ok",
+                parent=self.text)
+            if response is False:
+                return "cancel"
+        self.stop_readline()
+        self.canceled = True
+        self.closing = True
+        return EditorWindow.close(self)
+
+    def _close(self):
+        "Extend EditorWindow._close(), shut down debugger and execution server"
+        self.close_debugger()
+        if use_subprocess:
+            self.interp.kill_subprocess()
+        # Restore std streams
+        sys.stdout = self.save_stdout
+        sys.stderr = self.save_stderr
+        sys.stdin = self.save_stdin
+        # Break cycles
+        self.interp = None
+        self.console = None
+        self.flist.pyshell = None
+        self.history = None
+        EditorWindow._close(self)
+
+    def ispythonsource(self, filename):
+        "Override EditorWindow method: never remove the colorizer"
+        return True
+
+    def short_title(self):
+        return self.shell_title
+
+    COPYRIGHT = \
+          'Type "help", "copyright", "credits" or "license()" for more information.'
+
+    def begin(self):
+        self.text.mark_set("iomark", "insert")
+        self.resetoutput()
+        if use_subprocess:
+            nosub = ''
+            client = self.interp.start_subprocess()
+            if not client:
+                self.close()
+                return False
+        else:
+            nosub = ("==== No Subprocess ====\n\n" +
+                    "WARNING: Running IDLE without a Subprocess is deprecated\n" +
+                    "and will be removed in a later version. See Help/IDLE Help\n" +
+                    "for details.\n\n")
+            sys.displayhook = rpc.displayhook
+
+        self.write("Python %s on %s\n%s\n%s" %
+                   (sys.version, sys.platform, self.COPYRIGHT, nosub))
+        self.text.focus_force()
+        self.showprompt()
+        import tkinter
+        tkinter._default_root = None # 03Jan04 KBK What's this?
+        return True
+
+    def stop_readline(self):
+        if not self.reading:  # no nested mainloop to exit.
+            return
+        self._stop_readline_flag = True
+        self.top.quit()
+
+    def readline(self):
+        save = self.reading
+        try:
+            self.reading = 1
+            self.top.mainloop()  # nested mainloop()
+        finally:
+            self.reading = save
+        if self._stop_readline_flag:
+            self._stop_readline_flag = False
+            return ""
+        line = self.text.get("iomark", "end-1c")
+        if len(line) == 0:  # may be EOF if we quit our mainloop with Ctrl-C
+            line = "\n"
+        self.resetoutput()
+        if self.canceled:
+            self.canceled = 0
+            if not use_subprocess:
+                raise KeyboardInterrupt
+        if self.endoffile:
+            self.endoffile = 0
+            line = ""
+        return line
+
+    def isatty(self):
+        return True
+
+    def cancel_callback(self, event=None):
+        try:
+            if self.text.compare("sel.first", "!=", "sel.last"):
+                return # Active selection -- always use default binding
+        except:
+            pass
+        if not (self.executing or self.reading):
+            self.resetoutput()
+            self.interp.write("KeyboardInterrupt\n")
+            self.showprompt()
+            return "break"
+        self.endoffile = 0
+        self.canceled = 1
+        if (self.executing and self.interp.rpcclt):
+            if self.interp.getdebugger():
+                self.interp.restart_subprocess()
+            else:
+                self.interp.interrupt_subprocess()
+        if self.reading:
+            self.top.quit()  # exit the nested mainloop() in readline()
+        return "break"
+
+    def eof_callback(self, event):
+        if self.executing and not self.reading:
+            return # Let the default binding (delete next char) take over
+        if not (self.text.compare("iomark", "==", "insert") and
+                self.text.compare("insert", "==", "end-1c")):
+            return # Let the default binding (delete next char) take over
+        if not self.executing:
+            self.resetoutput()
+            self.close()
+        else:
+            self.canceled = 0
+            self.endoffile = 1
+            self.top.quit()
+        return "break"
+
+    def linefeed_callback(self, event):
+        # Insert a linefeed without entering anything (still autoindented)
+        if self.reading:
+            self.text.insert("insert", "\n")
+            self.text.see("insert")
+        else:
+            self.newline_and_indent_event(event)
+        return "break"
+
+    def enter_callback(self, event):
+        if self.executing and not self.reading:
+            return # Let the default binding (insert '\n') take over
+        # If some text is selected, recall the selection
+        # (but only if this before the I/O mark)
+        try:
+            sel = self.text.get("sel.first", "sel.last")
+            if sel:
+                if self.text.compare("sel.last", "<=", "iomark"):
+                    self.recall(sel, event)
+                    return "break"
+        except:
+            pass
+        # If we're strictly before the line containing iomark, recall
+        # the current line, less a leading prompt, less leading or
+        # trailing whitespace
+        if self.text.compare("insert", "<", "iomark linestart"):
+            # Check if there's a relevant stdin range -- if so, use it
+            prev = self.text.tag_prevrange("stdin", "insert")
+            if prev and self.text.compare("insert", "<", prev[1]):
+                self.recall(self.text.get(prev[0], prev[1]), event)
+                return "break"
+            next = self.text.tag_nextrange("stdin", "insert")
+            if next and self.text.compare("insert lineend", ">=", next[0]):
+                self.recall(self.text.get(next[0], next[1]), event)
+                return "break"
+            # No stdin mark -- just get the current line, less any prompt
+            indices = self.text.tag_nextrange("console", "insert linestart")
+            if indices and \
+               self.text.compare(indices[0], "<=", "insert linestart"):
+                self.recall(self.text.get(indices[1], "insert lineend"), event)
+            else:
+                self.recall(self.text.get("insert linestart", "insert lineend"), event)
+            return "break"
+        # If we're between the beginning of the line and the iomark, i.e.
+        # in the prompt area, move to the end of the prompt
+        if self.text.compare("insert", "<", "iomark"):
+            self.text.mark_set("insert", "iomark")
+        # If we're in the current input and there's only whitespace
+        # beyond the cursor, erase that whitespace first
+        s = self.text.get("insert", "end-1c")
+        if s and not s.strip():
+            self.text.delete("insert", "end-1c")
+        # If we're in the current input before its last line,
+        # insert a newline right at the insert point
+        if self.text.compare("insert", "<", "end-1c linestart"):
+            self.newline_and_indent_event(event)
+            return "break"
+        # We're in the last line; append a newline and submit it
+        self.text.mark_set("insert", "end-1c")
+        if self.reading:
+            self.text.insert("insert", "\n")
+            self.text.see("insert")
+        else:
+            self.newline_and_indent_event(event)
+        self.text.tag_add("stdin", "iomark", "end-1c")
+        self.text.update_idletasks()
+        if self.reading:
+            self.top.quit() # Break out of recursive mainloop()
+        else:
+            self.runit()
+        return "break"
+
+    def recall(self, s, event):
+        # remove leading and trailing empty or whitespace lines
+        s = re.sub(r'^\s*\n', '' , s)
+        s = re.sub(r'\n\s*$', '', s)
+        lines = s.split('\n')
+        self.text.undo_block_start()
+        try:
+            self.text.tag_remove("sel", "1.0", "end")
+            self.text.mark_set("insert", "end-1c")
+            prefix = self.text.get("insert linestart", "insert")
+            if prefix.rstrip().endswith(':'):
+                self.newline_and_indent_event(event)
+                prefix = self.text.get("insert linestart", "insert")
+            self.text.insert("insert", lines[0].strip())
+            if len(lines) > 1:
+                orig_base_indent = re.search(r'^([ \t]*)', lines[0]).group(0)
+                new_base_indent  = re.search(r'^([ \t]*)', prefix).group(0)
+                for line in lines[1:]:
+                    if line.startswith(orig_base_indent):
+                        # replace orig base indentation with new indentation
+                        line = new_base_indent + line[len(orig_base_indent):]
+                    self.text.insert('insert', '\n'+line.rstrip())
+        finally:
+            self.text.see("insert")
+            self.text.undo_block_stop()
+
+    def runit(self):
+        line = self.text.get("iomark", "end-1c")
+        # Strip off last newline and surrounding whitespace.
+        # (To allow you to hit return twice to end a statement.)
+        i = len(line)
+        while i > 0 and line[i-1] in " \t":
+            i = i-1
+        if i > 0 and line[i-1] == "\n":
+            i = i-1
+        while i > 0 and line[i-1] in " \t":
+            i = i-1
+        line = line[:i]
+        self.interp.runsource(line)
+
+    def open_stack_viewer(self, event=None):
+        if self.interp.rpcclt:
+            return self.interp.remote_stack_viewer()
+        try:
+            sys.last_traceback
+        except:
+            tkMessageBox.showerror("No stack trace",
+                "There is no stack trace yet.\n"
+                "(sys.last_traceback is not defined)",
+                parent=self.text)
+            return
+        from idlelib.stackviewer import StackBrowser
+        StackBrowser(self.root, self.flist)
+
+    def view_restart_mark(self, event=None):
+        self.text.see("iomark")
+        self.text.see("restart")
+
+    def restart_shell(self, event=None):
+        "Callback for Run/Restart Shell Cntl-F6"
+        self.interp.restart_subprocess(with_cwd=True)
+
+    def showprompt(self):
+        self.resetoutput()
+        self.console.write(self.prompt)
+        self.text.mark_set("insert", "end-1c")
+        self.set_line_and_column()
+        self.io.reset_undo()
+
+    def show_warning(self, msg):
+        width = self.interp.tkconsole.width
+        wrapper = TextWrapper(width=width, tabsize=8, expand_tabs=True)
+        wrapped_msg = '\n'.join(wrapper.wrap(msg))
+        if not wrapped_msg.endswith('\n'):
+            wrapped_msg += '\n'
+        self.per.bottom.insert("iomark linestart", wrapped_msg, "stderr")
+
+    def resetoutput(self):
+        source = self.text.get("iomark", "end-1c")
+        if self.history:
+            self.history.store(source)
+        if self.text.get("end-2c") != "\n":
+            self.text.insert("end-1c", "\n")
+        self.text.mark_set("iomark", "end-1c")
+        self.set_line_and_column()
+
+    def write(self, s, tags=()):
+        try:
+            self.text.mark_gravity("iomark", "right")
+            count = OutputWindow.write(self, s, tags, "iomark")
+            self.text.mark_gravity("iomark", "left")
+        except:
+            raise ###pass  # ### 11Aug07 KBK if we are expecting exceptions
+                           # let's find out what they are and be specific.
+        if self.canceled:
+            self.canceled = 0
+            if not use_subprocess:
+                raise KeyboardInterrupt
+        return count
+
+    def rmenu_check_cut(self):
+        try:
+            if self.text.compare('sel.first', '<', 'iomark'):
+                return 'disabled'
+        except TclError: # no selection, so the index 'sel.first' doesn't exist
+            return 'disabled'
+        return super().rmenu_check_cut()
+
+    def rmenu_check_paste(self):
+        if self.text.compare('insert','<','iomark'):
+            return 'disabled'
+        return super().rmenu_check_paste()
+
+
+def fix_x11_paste(root):
+    "Make paste replace selection on x11.  See issue #5124."
+    if root._windowingsystem == 'x11':
+        for cls in 'Text', 'Entry', 'Spinbox':
+            root.bind_class(
+                cls,
+                '<<Paste>>',
+                'catch {%W delete sel.first sel.last}\n' +
+                        root.bind_class(cls, '<<Paste>>'))
+
+
+usage_msg = """\
+
+USAGE: idle  [-deins] [-t title] [file]*
+       idle  [-dns] [-t title] (-c cmd | -r file) [arg]*
+       idle  [-dns] [-t title] - [arg]*
+
+  -h         print this help message and exit
+  -n         run IDLE without a subprocess (DEPRECATED,
+             see Help/IDLE Help for details)
+
+The following options will override the IDLE 'settings' configuration:
+
+  -e         open an edit window
+  -i         open a shell window
+
+The following options imply -i and will open a shell:
+
+  -c cmd     run the command in a shell, or
+  -r file    run script from file
+
+  -d         enable the debugger
+  -s         run $IDLESTARTUP or $PYTHONSTARTUP before anything else
+  -t title   set title of shell window
+
+A default edit window will be bypassed when -c, -r, or - are used.
+
+[arg]* are passed to the command (-c) or script (-r) in sys.argv[1:].
+
+Examples:
+
+idle
+        Open an edit window or shell depending on IDLE's configuration.
+
+idle foo.py foobar.py
+        Edit the files, also open a shell if configured to start with shell.
+
+idle -est "Baz" foo.py
+        Run $IDLESTARTUP or $PYTHONSTARTUP, edit foo.py, and open a shell
+        window with the title "Baz".
+
+idle -c "import sys; print(sys.argv)" "foo"
+        Open a shell window and run the command, passing "-c" in sys.argv[0]
+        and "foo" in sys.argv[1].
+
+idle -d -s -r foo.py "Hello World"
+        Open a shell window, run a startup script, enable the debugger, and
+        run foo.py, passing "foo.py" in sys.argv[0] and "Hello World" in
+        sys.argv[1].
+
+echo "import sys; print(sys.argv)" | idle - "foobar"
+        Open a shell window, run the script piped in, passing '' in sys.argv[0]
+        and "foobar" in sys.argv[1].
+"""
+
+def main():
+    import getopt
+    from platform import system
+    from idlelib import testing  # bool value
+    from idlelib import macosx
+
+    global flist, root, use_subprocess
+
+    capture_warnings(True)
+    use_subprocess = True
+    enable_shell = False
+    enable_edit = False
+    debug = False
+    cmd = None
+    script = None
+    startup = False
+    try:
+        opts, args = getopt.getopt(sys.argv[1:], "c:deihnr:st:")
+    except getopt.error as msg:
+        print("Error: %s\n%s" % (msg, usage_msg), file=sys.stderr)
+        sys.exit(2)
+    for o, a in opts:
+        if o == '-c':
+            cmd = a
+            enable_shell = True
+        if o == '-d':
+            debug = True
+            enable_shell = True
+        if o == '-e':
+            enable_edit = True
+        if o == '-h':
+            sys.stdout.write(usage_msg)
+            sys.exit()
+        if o == '-i':
+            enable_shell = True
+        if o == '-n':
+            print(" Warning: running IDLE without a subprocess is deprecated.",
+                  file=sys.stderr)
+            use_subprocess = False
+        if o == '-r':
+            script = a
+            if os.path.isfile(script):
+                pass
+            else:
+                print("No script file: ", script)
+                sys.exit()
+            enable_shell = True
+        if o == '-s':
+            startup = True
+            enable_shell = True
+        if o == '-t':
+            PyShell.shell_title = a
+            enable_shell = True
+    if args and args[0] == '-':
+        cmd = sys.stdin.read()
+        enable_shell = True
+    # process sys.argv and sys.path:
+    for i in range(len(sys.path)):
+        sys.path[i] = os.path.abspath(sys.path[i])
+    if args and args[0] == '-':
+        sys.argv = [''] + args[1:]
+    elif cmd:
+        sys.argv = ['-c'] + args
+    elif script:
+        sys.argv = [script] + args
+    elif args:
+        enable_edit = True
+        pathx = []
+        for filename in args:
+            pathx.append(os.path.dirname(filename))
+        for dir in pathx:
+            dir = os.path.abspath(dir)
+            if not dir in sys.path:
+                sys.path.insert(0, dir)
+    else:
+        dir = os.getcwd()
+        if dir not in sys.path:
+            sys.path.insert(0, dir)
+    # check the IDLE settings configuration (but command line overrides)
+    edit_start = idleConf.GetOption('main', 'General',
+                                    'editor-on-startup', type='bool')
+    enable_edit = enable_edit or edit_start
+    enable_shell = enable_shell or not enable_edit
+
+    # Setup root.  Don't break user code run in IDLE process.
+    # Don't change environment when testing.
+    if use_subprocess and not testing:
+        NoDefaultRoot()
+    root = Tk(className="Idle")
+    root.withdraw()
+    from idlelib.run import fix_scaling
+    fix_scaling(root)
+
+    # set application icon
+    icondir = os.path.join(os.path.dirname(__file__), 'Icons')
+    if system() == 'Windows':
+        iconfile = os.path.join(icondir, 'idle.ico')
+        root.wm_iconbitmap(default=iconfile)
+    elif not macosx.isAquaTk():
+        ext = '.png' if TkVersion >= 8.6 else '.gif'
+        iconfiles = [os.path.join(icondir, 'idle_%d%s' % (size, ext))
+                     for size in (16, 32, 48)]
+        icons = [PhotoImage(master=root, file=iconfile)
+                 for iconfile in iconfiles]
+        root.wm_iconphoto(True, *icons)
+
+    # start editor and/or shell windows:
+    fixwordbreaks(root)
+    fix_x11_paste(root)
+    flist = PyShellFileList(root)
+    macosx.setupApp(root, flist)
+
+    if enable_edit:
+        if not (cmd or script):
+            for filename in args[:]:
+                if flist.open(filename) is None:
+                    # filename is a directory actually, disconsider it
+                    args.remove(filename)
+            if not args:
+                flist.new()
+
+    if enable_shell:
+        shell = flist.open_shell()
+        if not shell:
+            return # couldn't open shell
+        if macosx.isAquaTk() and flist.dict:
+            # On OSX: when the user has double-clicked on a file that causes
+            # IDLE to be launched the shell window will open just in front of
+            # the file she wants to see. Lower the interpreter window when
+            # there are open files.
+            shell.top.lower()
+    else:
+        shell = flist.pyshell
+
+    # Handle remaining options. If any of these are set, enable_shell
+    # was set also, so shell must be true to reach here.
+    if debug:
+        shell.open_debugger()
+    if startup:
+        filename = os.environ.get("IDLESTARTUP") or \
+                   os.environ.get("PYTHONSTARTUP")
+        if filename and os.path.isfile(filename):
+            shell.interp.execfile(filename)
+    if cmd or script:
+        shell.interp.runcommand("""if 1:
+            import sys as _sys
+            _sys.argv = %r
+            del _sys
+            \n""" % (sys.argv,))
+        if cmd:
+            shell.interp.execsource(cmd)
+        elif script:
+            shell.interp.prepend_syspath(script)
+            shell.interp.execfile(script)
+    elif shell:
+        # If there is a shell window and no cmd or script in progress,
+        # check for problematic issues and print warning message(s) in
+        # the IDLE shell window; this is less intrusive than always
+        # opening a separate window.
+
+        # Warn if using a problematic OS X Tk version.
+        tkversionwarning = macosx.tkVersionWarning(root)
+        if tkversionwarning:
+            shell.show_warning(tkversionwarning)
+
+        # Warn if the "Prefer tabs when opening documents" system
+        # preference is set to "Always".
+        prefer_tabs_preference_warning = macosx.preferTabsPreferenceWarning()
+        if prefer_tabs_preference_warning:
+            shell.show_warning(prefer_tabs_preference_warning)
+
+    while flist.inversedict:  # keep IDLE running while files are open.
+        root.mainloop()
+    root.destroy()
+    capture_warnings(False)
+
+if __name__ == "__main__":
+    main()
+
+capture_warnings(False)  # Make sure turned off; see issue 18081