TLDs that are also file extensions

#!/usr/bin/env python3

"""
PoC to find file extensions that are also valid TLDs
"""
import sys

def read_filelist(filename):
  file_types = {}
  with open(filename) as f:
    lines = f.readlines()
    for line in lines:
      if line.startswith('.'):
        (ext, desc) = line.split(' ', 1)
        ext = ext.strip('.')
        file_types[ext] = desc.strip()
  return file_types

def read_tlds(filename):
  tlds = []
  with open(filename) as f:
    lines = f.readlines()
    for line in lines:
      tlds.append(line.lower().strip())
  return tlds

def main():
  """pylint FTW"""
  tlds = read_tlds('tlds-alpha-by-domain.txt')
  extensions = read_filelist('file_extension_tlds.txt')
  print ("| Extension | Description |")
  print ("| --------- | ----------- |")
  for ext in extensions:
    if ext in tlds:
      print ("| %s | %s |" % (ext, extensions[ext]))


if __name__ == "__main__":
    main()
    sys.exit(0)