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      1 #!/usr/bin/env python
      2 import sys
      3 import urllib.request, urllib.error, urllib.parse
      4 import codecs
      5 
      6 def main():
      7     encodings = []
      8     f = urllib.request.urlopen(sys.argv[1])
      9     for line in f:
     10         if line.startswith("Name: ") or line.startswith("Alias: "):
     11             enc = line.split()[1]
     12             try:
     13                 codecs.lookup(enc)
     14                 if enc.lower not in encodings:
     15                     encodings.append(enc.lower())
     16             except LookupError:
     17                 pass
     18     sys.stdout.write("encodings = frozenset((\n")
     19     for enc in encodings:
     20         sys.stdout.write('    "%s",\n'%enc)
     21     sys.stdout.write('    ))')
     22 
     23 if __name__ == "__main__":
     24     main()