cannot activate a venv environment on a Swiss German windows

[samstagern]

BPO	35148
Nosy	@vsajip, @eryksun, @samstagern, @moltob
PRs	bpo-32409 Ensures activate.bat can handle Unicode contents #10295 bpo-35148: fix resetting codepage in activate.bat #10696
Superseder	bpo-34144: venv activate.bat reset codepage fails on windows 10

^{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 2019-05-03.19:02:01.711>
created_at = <Date 2018-11-02.16:39:43.943>
labels = ['3.7', '3.8', 'type-bug', 'library']
title = 'cannot activate a venv environment on a Swiss German windows'
updated_at = <Date 2019-05-03.19:02:01.710>
user = 'https://github.com/samstagern'

bugs.python.org fields:

activity = <Date 2019-05-03.19:02:01.710>
actor = 'eryksun'
assignee = 'none'
closed = True
closed_date = <Date 2019-05-03.19:02:01.711>
closer = 'eryksun'
components = ['Library (Lib)']
creation = <Date 2018-11-02.16:39:43.943>
creator = 'Martin Bijl-Schwab'
dependencies = []
files = []
hgrepos = []
issue_num = 35148
keywords = ['patch']
message_count = 5.0
messages = ['329140', '329145', '329159', '329432', '332182']
nosy_count = 4.0
nosy_names = ['vinay.sajip', 'eryksun', 'Martin Bijl-Schwab', 'mpagel']
pr_nums = ['10295', '10696']
priority = 'normal'
resolution = 'duplicate'
stage = 'resolved'
status = 'closed'
superseder = '34144'
type = 'behavior'
url = 'https://bugs.python.org/issue35148'
versions = ['Python 3.7', 'Python 3.8']

[samstagern]

There is a small bug in the activate.bat script causing problems on internationalized Windows systems.

C:\repo\gui>python -m venv venv

C:\repo\gui>call venv\Scripts\activate.bat
Parameterformat falsch - 850.

This translates to "Wrong parameter - 850."

For the user it is not obvious what went wrong.

The virtual environment is setup and will work in most cases.

Link to https://bugs.python.org/issue32409.

[vsajip]

So - are you saying that chcp prints "850." when asked for the current code page but won't accept "850." when setting the code page, requiring just "850"?

[eryksun]

The Windows command line often has inconsistently localized strings. In this case it's from the ulib.dll utility library. For German, message 0x7692 in "de-DE\ulib.dll.mui" is "Aktive Codepage: %1.\r\n", which has a period after the %1 insert. In the English UI it's "Active code page: %1\r\n", with no period. I commented on the PR that we could work around this by adding "." to the list of token delimiters (delims).

[vsajip]

Fixed, see bpo-32409 for commit information.

[moltob]

Dear developers on the nosy list: Would it be possible that someone does a quick review of my related fix in #10696?

It is extremely simple and has minimal side effects, but would relieve us from getting this annoying error in the future.

I know this is a minor thing but each time I start a venv in Germany, I am reminded of this... :-)

Thanks a lot.