[issue42970] File path with blank causes open error in 3.8, not in 3.7

[Ronald Oussoren]

Ronald Oussoren  added the comment:

This might be a security feature in Big Sur, access to some locations is 
restricted by default. I'm not sure if that includes ~/Library, it definitely 
affects access to ~/Documents. I'd expect to see a security pop-up from the 
system though.

I cannot reproduce this with python 3.9.1 on Big Sur on an M1 system.

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[issue42970] File path with blank causes open error in 3.8, not in 3.7

[Serhiy Storchaka]

Serhiy Storchaka  added the comment:

Please provide complete script that reproduces the issue. The provided three 
lines do not open any file and cannot generate such error.

It could help to add the debug prints:

print(f'mySrcFldr = {mySrcFldr!a}')
print(f'srcFldr = {srcFldr!a}')
print(f'f = {f!a}')

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nosy: +serhiy.storchaka

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[issue42970] File path with blank causes open error in 3.8, not in 3.7

[Ronald Oussoren]

Ronald Oussoren  added the comment:

What kind of error do you get?

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nosy: +ronaldoussoren

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[issue42970] File path with blank causes open error in 3.8, not in 3.7

[Doug Day]

Doug Day  added the comment:

To clarify: either python version generates the same path. On 3.8.2 though an 
open error results

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[issue42970] File path with blank causes open error in 3.8, not in 3.7

[Doug Day]

New submission from Doug Day :

The following code generates a path that works in Pythons 3.7.6 on macOS Big 
Sur but not in Catalina  with 3.8.2.. 
mySrcFldr="~/Library/Mobile Documents/com~apple~CloudDocs/Utilities/"
srcFldr=os.path.expanduser(mySrcFldr)
f=os.path.join(srcFldr,"mortgage.py")

When python tries to run the code file(montage.py) on 3.8.2, an open error 
results.
/Library/Developer/CommandLineTools/usr/bin/python3: can't open file 
'/Users/Doug/Library/Mobile': [Errno 2] No such file or directory
 I tried putting a backslash after 'Mobile'. Does not help.
The complete path is:
'/Users/Doug/Library/Mobile Documents/com~apple~CloudDocs/Utilities/mortgage.py'

While the doc changes show some changes in the os.path module, I see no mention 
of this issue.

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components: Interpreter Core
messages: 385290
nosy: dday52
priority: normal
severity: normal
status: open
title: File path with blank causes open error in 3.8, not in 3.7
versions: Python 3.8

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