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os.path.exists() returns False for certain file name #74013
Description
| BPO | 29827 |
|---|---|
| Nosy | @pfmoore, @tjguk, @zware, @eryksun, @zooba |
Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.
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GitHub fields:
assignee = None
closed_at = <Date 2017-03-16.15:04:59.216>
created_at = <Date 2017-03-16.14:27:55.075>
labels = ['type-bug', 'invalid', 'OS-windows']
title = 'os.path.exists() returns False for certain file name'
updated_at = <Date 2017-03-16.15:04:59.213>
user = 'https://bugs.python.org/MarkoMavrinac'bugs.python.org fields:
activity = <Date 2017-03-16.15:04:59.213>
actor = 'eryksun'
assignee = 'none'
closed = True
closed_date = <Date 2017-03-16.15:04:59.216>
closer = 'eryksun'
components = ['Windows']
creation = <Date 2017-03-16.14:27:55.075>
creator = 'Marko Mavrinac'
dependencies = []
files = []
hgrepos = []
issue_num = 29827
keywords = []
message_count = 3.0
messages = ['289717', '289718', '289719']
nosy_count = 6.0
nosy_names = ['paul.moore', 'tim.golden', 'zach.ware', 'eryksun', 'steve.dower', 'Marko Mavrinac']
pr_nums = []
priority = 'normal'
resolution = 'not a bug'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue29827'
versions = ['Python 2.7']
Activity
MarkoMavrinac commentedon Mar 16, 2017
I have two files in two different folders, both on desktop.
If I try using os.path.exists() on both of them, it returns True for one file and False for the other file.
After renaming file that I got False from, I get returned True and when I rename it back, it returns False again.
File name causing the problem is "testni.wav", I assume it's anything starting with "test", but I'm sure you guys will know better. Thank you
Detailed description with screenshots can be seen here: http://stackoverflow.com/questions/42834408/os-path-exists-returning-false-for-one-and-true-for-another-file-both-files-e
MarkoMavrinac commentedon Mar 16, 2017
I am sorry, I didn't realize \t affected how the path was recognized.
eryksun commentedon Mar 16, 2017
In a string literal, '\t' represents a tab character (ordinal 9). Windows filenames cannot contain control characters 1, i.e. ordinals 1-31. For path literals I recommend using forward slashes and normalizing via os.path.normpath, e.g. filepath = os.path.normpath('C:/Users/mavri/Desktop/proba/testni.wav').
FYI, the way exists() is written handles any OSError as False:
In your case, stat() fails with ERROR_INVALID_NAME (123):
>>> os.stat('\testni.wav') Traceback (most recent call last): File "<stdin>", line 1, in <module> OSError: [WinError 123] The filename, directory name, or volume label syntax is incorrect: '\testni.wav'