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Environ doesn't escape spaces properly #49348

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stuaxo mannequin opened this issue Jan 29, 2009 · 3 comments
Closed

Environ doesn't escape spaces properly #49348

stuaxo mannequin opened this issue Jan 29, 2009 · 3 comments
Labels
type-bug An unexpected behavior, bug, or error

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@stuaxo
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Mannequin

stuaxo mannequin commented Jan 29, 2009

BPO 5098
Nosy @loewis

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 2009-01-29.19:22:38.899>
created_at = <Date 2009-01-29.14:41:56.584>
labels = ['type-bug', 'invalid']
title = "Environ doesn't escape spaces properly"
updated_at = <Date 2009-01-29.19:22:38.815>
user = 'https://bugs.python.org/stuaxo'

bugs.python.org fields:

activity = <Date 2009-01-29.19:22:38.815>
actor = 'loewis'
assignee = 'none'
closed = True
closed_date = <Date 2009-01-29.19:22:38.899>
closer = 'loewis'
components = ['None']
creation = <Date 2009-01-29.14:41:56.584>
creator = 'stuaxo'
dependencies = []
files = []
hgrepos = []
issue_num = 5098
keywords = []
message_count = 3.0
messages = ['80765', '80767', '80779']
nosy_count = 3.0
nosy_names = ['loewis', 'exarkun', 'stuaxo']
pr_nums = []
priority = 'normal'
resolution = 'not a bug'
stage = None
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue5098'
versions = ['Python 2.5']
@stuaxo
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Mannequin Author

stuaxo mannequin commented Jan 29, 2009

os.environ doesn't escape spaces, but does backslashes and others

In the windows python interpreter I echo'd the variable 'ProgramFiles',
then in the commandprompt.

>>> from os import environ
>>> environ['ProgramFiles']
'C:\\Program Files'
>>> ^Z

[C:\]echo %ProgramFiles%
C:\Program Files

This 'half' escapping seems odd, and is annoying when building file
paths for instance, probably the space should also be escaped.

@stuaxo stuaxo mannequin added the type-bug An unexpected behavior, bug, or error label Jan 29, 2009
@exarkun
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Mannequin

exarkun mannequin commented Jan 29, 2009

The backslash escaping has nothing to do with os.environ. It's the way
any string with a backslash in it is displayed in the interactive
interpreter (it's the way str.__repr__ works). Performing any escaping
on a string to make it usable in a command line is a task which is
inappropriate as a feature of os.environ. The contents of os.environ
are just strings. If you want to use them in a command line, you need
to escape them appropriately. Notice that in addition to escaping the
space, you may also sometimes need to escape a backslash (not in this
case on Windows, though, since a single \ is allowed here). The
escaping of the \ in this example is *only* in the *display* of the
variable - there is only one \ in the string itself.

I recommend closing this ticket as invalid.

@loewis
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Mannequin

loewis mannequin commented Jan 29, 2009

As Jean-Paul explains, you are misinterpreting what you are seeing.
Closing as invalid.

@loewis loewis mannequin closed this as completed Jan 29, 2009
@loewis loewis mannequin added the invalid label Jan 29, 2009
@ezio-melotti ezio-melotti transferred this issue from another repository Apr 10, 2022
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