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1 #!/usr/bin/env python3
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2
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3 # Kranti Konganti
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4
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5 import argparse
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6 import base64
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7 import gzip
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8 import inspect
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9 import json
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10 import logging
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11 import os
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12 import pprint
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13 import re
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14 from collections import defaultdict
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15
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16 import requests
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17
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18
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19 # Multiple inheritence for pretty printing of help text.
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20 class MultiArgFormatClasses(argparse.RawTextHelpFormatter, argparse.ArgumentDefaultsHelpFormatter):
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21 pass
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22
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23
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24 # Main
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25 def main() -> None:
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26 """
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27 This script takes as input an assembly .fasta format (gzipped or ungzipped)
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28 and posts to PubMLST to get the species taxonomy.
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29 """
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30
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31 # Set logging.
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32 logging.basicConfig(
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33 format="\n" + "=" * 55 + "\n%(asctime)s - %(levelname)s\n" + "=" * 55 + "\n%(message)s\n\n",
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34 level=logging.DEBUG,
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35 )
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36
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37 # Debug print.
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38 ppp = pprint.PrettyPrinter(width=55)
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39 prog_name = os.path.basename(inspect.stack()[0].filename)
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40
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41 parser = argparse.ArgumentParser(
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42 prog=prog_name, description=main.__doc__, formatter_class=MultiArgFormatClasses
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43 )
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44
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45 required = parser.add_argument_group("required arguments")
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46
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47 required.add_argument(
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48 "-fasta",
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49 dest="fasta",
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50 default=False,
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51 required=True,
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52 help="Absolute UNIX path to file no. 1 containing\nnon white space lines.",
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53 )
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54 parser.add_argument(
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55 "-prefix",
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56 dest="prefix",
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57 default="response",
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58 required=False,
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59 help="The prefix of the file name that will be created in\nthe current working directory.",
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60 )
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61 parser.add_argument(
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62 "-fkey",
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63 dest="fkey",
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64 default="fields",
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65 required=False,
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66 help="The key name in the JSON response that contains ST results.",
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67 )
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68 parser.add_argument(
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69 "-tkey",
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70 dest="tkey",
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71 default="taxon_prediction",
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72 required=False,
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73 help="The key name in the JSON response that contains a list of\ntaxonomy predictions.",
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74 )
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75
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76 # Define defaults
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77
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78 args = parser.parse_args()
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79 fasta = args.fasta
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80 fkey = args.fkey
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81 tkey = args.tkey
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82 outfile = os.path.join(os.getcwd(), args.prefix + "_rmlstd.tsv")
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83 logfile = os.path.join(os.getcwd(), args.prefix + "_rmlst_req.log.json")
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84 field_keys = ["rST", "other_designation"]
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85 tax_pred_keys = ["rank", "support", "taxon", "taxonomy"]
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86 uri = "http://rest.pubmlst.org/db/pubmlst_rmlst_seqdef_kiosk/schemes/1/sequence"
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87 # uri = "https://rest.pubmlst.org/db/pubmlst_cronobacter_isolates/loci/atpD/sequence"
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88 payload = '{"base64":true, "details":true, "sequence":"'
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89 sample_name = str(args.prefix)
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90 out = defaultdict(defaultdict)
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91
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92 # Basic checks
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93
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94 if not (os.path.exists(fasta) and os.path.getsize(fasta) > 0):
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95 logging.error(f"File\n{os.path.basename(fasta)}\ndoes not exist or the file is empty.")
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96 exit(1)
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97
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98 try:
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99 with gzip.open(fasta, "rb") as fasta_fh:
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100 seqs = fasta_fh.read()
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101 except gzip.BadGzipFile:
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102 with open(fasta, "r") as fasta_fh:
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103 seqs = fasta_fh.read()
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104 payload += base64.b64encode(str(seqs).encode()).decode() + '"}'
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105 response = requests.post(uri, data=payload)
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106
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107 if response.status_code == requests.codes.ok:
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108 res = response.json()
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109 json.dump(res, open(logfile, "w"), indent=4, sort_keys=True)
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110
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111 try:
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112 for count, prediction in enumerate(res[tkey]):
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113 out.setdefault(tkey, {}).setdefault(count, {})
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114 for key in tax_pred_keys:
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115 out[tkey][count].setdefault(key, prediction[key])
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116 except (KeyError, AttributeError, TypeError) as e:
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117 logging.error(
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118 "Did not get taxonomy prediction from JSON response. Highly unusual?\n"
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119 + f"KeyError or AttributeError or TypeError:\n{e}"
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120 )
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121 exit(1)
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122
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123 try:
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124 for key in field_keys:
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125 out.setdefault(key, res[fkey][key])
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126 except (KeyError, AttributeError, TypeError) as e:
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127 for key in field_keys:
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128 out.setdefault(key, "-")
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129 logging.info(
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130 "Did not get rST or other_designation from JSON response. Will skip.\n"
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131 + f"KeyError or AttributeError or TypeError:\n{e}"
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132 )
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133
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134 try:
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135 with open(outfile, "w") as out_fh:
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136 # Header
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137 out_fh.writelines(
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138 "\t".join(
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139 ["Sample"]
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140 + [k for k, _ in out.items() if out[k] and k != tkey]
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141 + [k for k in out[tkey][0].keys() if out[tkey][0][k]]
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142 )
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143 )
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144 for count in out[tkey].keys():
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145 out_fh.writelines(
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146 "\n"
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147 + "\t".join(
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148 [sample_name]
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149 + [v for k, v in out.items() if out[k] and k != tkey]
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150 + [
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151 str(re.sub(r"\s*\>\s*", ";", str(v)))
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152 for k, v in out[tkey][count].items()
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153 if out[tkey][count][k]
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154 ],
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155 )
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156 + "\n"
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157 )
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158 out_fh.close()
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159 except (KeyError, AttributeError, TypeError) as e:
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160 logging.error(f"Unable to write final results.\nException: {e}")
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161 exit(1)
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162
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163
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164 if __name__ == "__main__":
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165 main()
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