recursively replace each char (substring) in *args from a given text

replace_chars.py

def rep_chars(txt, *args):
    """recursively replace each char (substring) in *args from a given text"""
    chars = [str(c) for c in args]
    if len(chars) < 1:
        return txt
    else:
        txt = txt.replace(chars.pop(), ' ' )
        return rep_chars( txt, *chars ) # repeat rep_chars() until *args is None

a = 'abcdefgh'
c1 = 'b'
c2 = 'fg'
rep_chars(a, c1, c2) # out: 'a cde h'

# see it in action: http://goo.gl/Fd0ZHW