old_contents: import hex_to_base64
  import sys
  sys.path.append('/usr/local/lib/python2.7/site-packages')
  from Crypto.Util import strxor
  
  def FixedXor(input_1, input_2):
    decoded_1 = input_1.decode("hex")
    decoded_2 = input_2.decode("hex")
    return strxor.strxor(decoded_1, decoded_2)
  
  def main():
    expected = "746865206b696420646f6e277420706c6179"
    assert expected.decode("hex") == FixedXor(
      "1c0111001f010100061a024b53535009181c",
      "686974207468652062756c6c277320657965"), FixedXor(
      "1c0111001f010100061a024b53535009181c",
      "686974207468652062756c6c277320657965")
  
  if __name__ == "__main__":
    main()
  
new_contents: import sys
  sys.path.append('/usr/local/lib/python2.7/site-packages')
  from Crypto.Util import strxor
  
  def FixedXor(input_1, input_2):
    decoded_1 = input_1.decode("hex")
    decoded_2 = input_2.decode("hex")
    return strxor.strxor(decoded_1, decoded_2)
  
  def main():
    expected = "746865206b696420646f6e277420706c6179"
    assert expected.decode("hex") == FixedXor(
      "1c0111001f010100061a024b53535009181c",
      "686974207468652062756c6c277320657965"), FixedXor(
      "1c0111001f010100061a024b53535009181c",
      "686974207468652062756c6c277320657965")
  
  if __name__ == "__main__":
    main()
  
subject: Remove an unused import