To filter invalid XML characters in python

InvalidXMLFilter.py

#Based on an answer by John Machin on Stack Overflow (http://stackoverflow.com/users/84270/john-machin)
#http://stackoverflow.com/questions/8733233/filtering-out-certain-bytes-in-python

def isValidXMLChar(char):
  codepoint = ord(char)
  return 0x20 <= codepoint <= 0xD7FF or   \
         codepoint in (0x9, 0xA, 0xD) or  \
         0xE000 <= codepoint <= 0xFFFD or \
         0x10000 <= codepoint <= 0x10FFFF

def filterInvalidXMLChars(input):
    return filter(isValidXMLChar, input)