Python codec/encoding which uses errors='replace' by default rather than errors='strict'

codecs_utf8_replace.py

import codecs

def find_utf8_replace(encoding):
  """Return the codec for 'utf8-replace'."""
  utf8_codecinfo = codecs.lookup('utf-8')

  def wrap(f):
    return lambda data, errors='replace', **kw: f(data, errors, **kw)

  if encoding == 'utf8-replace':
    return codecs.CodecInfo(
      name='utf8-replace',
      encode=wrap(utf8_codecinfo.encode),
      decode=wrap(utf8_codecinfo.decode),
      incrementalencoder=None,
      incrementaldecoder=None,
      streamreader=None,
      streamwriter=None,
      )
  return None

codecs.register(find_utf8_replace)

if __name__ == "__main__":
  print(u"\xff".decode('utf8-replace'))