Find the restricted symbols in the text and substitute with multiple replacement values.

multiple_replace.py

import re

# Restricted symbols taken from https://en.wikipedia.org/wiki/Filename
symbols = ('/', '\\', '?', '%', '*', ':', '|', '"', '<', '>',)

symbols_replacements = {symbol: '_' for symbol in symbols}
space_replacement = {' ': '-'}  # Dash instead of underscore

replacements = {}
replacements.update(symbols_replacements)
replacements.update(space_replacement)

text = 'Hello World 01/01/1970  a/b\c?d%e*f:g|h<i>j"'

# Solution 1
for pattern, repl in replacements.iteritems():
    text = re.sub(re.escape(pattern), repl, text)

# Solution 2
# pattern = re.compile('|'.join(map(re.escape, replacements.keys())))
# text = pattern.sub(lambda match: replacements[match.group(0)], text)

# Output: Hello-World-01_01_1970--a_b_c_d_e_f_g_h_i_j_
print text