File tests in Python?

Question

I'd like to use Python 3.3.3 to test for the existence of a backup file.

Something like this:

if backup does not exist:
    create it
    write to backup

otherwise:
    run other procedures not related to backup file

Any suggestions?

please search before asking, this has been asked and answered. — njzk2, Jan 24 '14 at 16:46
duplicate of http://stackoverflow.com/questions/82831/how-do-i-check-if-a-file-exists-using-python?lq=1 — Vader, Jan 24 '14 at 16:46

score 5 · Answer 1 · answered Jan 24 '14 at 16:44

5

>>> import os
>>> os.path.isfile('/path/to/file')
False

answered Jan 24 '14 at 16:44

falsetru

Please insert here the usual warning of introducing race conditions etc... – Adam Smith Jan 24 '14 at 17:00

score 2 · Answer 2 · answered Jan 24 '14 at 16:45

2

Take a look at os.path.exists.

answered Jan 24 '14 at 16:45

nmichaels

2 Answers2