Regular expression that finds and replaces non-ascii characters with Python

Question

I need to change some characters that are not ASCII to \'_\'. For example,

Tannh‰user -> Tannh_user

• If I use regular expression with Python, how

Answer 1

Using Python's support for character encodings:

# coding: utf8
import codecs

def underscorereplace_errors(exc):
  return (u'_', exc.end)

codecs.register_error('underscorereplace', underscorereplace_errors)

print u'Tannh‰user'.encode('ascii', 'underscorereplace')