String contains any character in group?

Question

I have a set of characters: \\,/,?,% etc. I also have a string, lets say \"This is my string % my string ?\"

I want to check if any of the characters are present in

Answer 1

In [1]: import re
In [2]: RE = re.compile('[\\\/\?%]')
In [3]: RE.search('abc')

In [4]: RE.search('abc?')
Out[4]: <_sre.SRE_Match at 0x1081bc1d0>
In [5]: RE.search('\\/asd')
Out[5]: <_sre.SRE_Match at 0x1081bc3d8>

None indicates non characters in the set are present in the target string.