Checking if a str is in a list of str?

Question

['aa', 'ab', 'aaaa', 'ggg', 'agaga', 'a']

From the above list, I'd like to be able to find out if the list contains a 'b' in the shortest possible ways. Thanks!

Your expected outcome being "no" (even though `ab` has the substring `b`)? — Ulrich Schwarz, Mar 04 '15 at 16:47

score 7 · Accepted Answer · answered Mar 04 '15 at 16:48

7

For substrings:

any('b' in s for s in input_list)

For full strings:

'b' in input_list

answered Mar 04 '15 at 16:48

Łukasz Rogalski

Malik Brahimi · Answer 2 · 2015-03-04T16:59:17.360

1

You can join the items an test for a b in the joined string:

'b' in ' '.join(your_list)

edited Mar 04 '15 at 16:59

answered Mar 04 '15 at 16:49

Malik Brahimi

This works well enough if you're checking for a string of length one. But if you're looking for `"xyz"`, and `your_list` contains `['ax', 'yz']`, your expression returns True even though no single element of `your_list` contains "xyz" – Kevin Mar 04 '15 at 16:58
Then make the separator a space. – Malik Brahimi Mar 04 '15 at 16:59
Then it will incorrectly give True if you're looking for `"x yz"`. – Kevin Mar 04 '15 at 17:27

2 Answers2