Checking strings for "bad" characters

[Harvey Thomas]

I've got some very long Unicode strings which I wish to test for the presence of ASCII characters 0-8 and 14-31. My first thought was to use regular expressions, e.g.:

import re
r = re.compile(u'[%s%s]' % (''.join([unichr(x) for x in range(0, 9)]) , ''.join([unichr(x) for x in range(14, 32)])))
amatch = r.search(r)
if amatch:
    print "Bad characters"
else:
    print "OK"

but is there a better or faster method.

TIA

Harvey

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