Mercurial > repos > rliterman > csp2
comparison CSP2/CSP2_env/env-d9b9114564458d9d-741b3de822f2aaca6c6caa4325c4afce/lib/python3.8/idlelib/delegator.py @ 69:33d812a61356
planemo upload commit 2e9511a184a1ca667c7be0c6321a36dc4e3d116d
| author | jpayne |
|---|---|
| date | Tue, 18 Mar 2025 17:55:14 -0400 |
| parents | |
| children |
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| 67:0e9998148a16 | 69:33d812a61356 |
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| 1 class Delegator: | |
| 2 | |
| 3 def __init__(self, delegate=None): | |
| 4 self.delegate = delegate | |
| 5 self.__cache = set() | |
| 6 # Cache is used to only remove added attributes | |
| 7 # when changing the delegate. | |
| 8 | |
| 9 def __getattr__(self, name): | |
| 10 attr = getattr(self.delegate, name) # May raise AttributeError | |
| 11 setattr(self, name, attr) | |
| 12 self.__cache.add(name) | |
| 13 return attr | |
| 14 | |
| 15 def resetcache(self): | |
| 16 "Removes added attributes while leaving original attributes." | |
| 17 # Function is really about resetting delegator dict | |
| 18 # to original state. Cache is just a means | |
| 19 for key in self.__cache: | |
| 20 try: | |
| 21 delattr(self, key) | |
| 22 except AttributeError: | |
| 23 pass | |
| 24 self.__cache.clear() | |
| 25 | |
| 26 def setdelegate(self, delegate): | |
| 27 "Reset attributes and change delegate." | |
| 28 self.resetcache() | |
| 29 self.delegate = delegate | |
| 30 | |
| 31 if __name__ == '__main__': | |
| 32 from unittest import main | |
| 33 main('idlelib.idle_test.test_delegator', verbosity=2) |