The Python Oracle

checking if there is a folder with a name that start with a specific string

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Chapters
00:00 Question
01:03 Accepted answer (Score 15)
01:22 Answer 2 (Score 6)
01:33 Answer 3 (Score 6)
01:53 Thank you

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Full question
https://stackoverflow.com/questions/8201...

Accepted answer links:
[any]: http://docs.python.org/library/functions...
[generator expression]: http://en.wikipedia.org/wiki/Python_synt...

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Tags
#python

#avk47


ACCEPTED ANSWER

Score 16


You could do the following:

import os
if any(x.startswith('runner') for x in os.listdir('/path/to/runners')):
    print "At least one entry begins with 'runner'"

That uses the helpful any function and a generator expression.



ANSWER 2

Score 7


Mark Longair's answer is quite fine, and an (equivalent) alternative for this kind of expression is to use glob:

import glob
if glob.glob('/path/to/runners/runner*'):
    print "At least one entry begins with 'runner'"


ANSWER 3

Score 6


import glob

if glob.glob('/path/to/runners/runner*'):
    print 'condition satisfied'