Re: [IBMiOSS] Do worry - Python newbie calling -- OPENSOURCE

Here’s the Python docs on virtual environments: https://docs.python.org/3/library/venv.html
Which also links to https://packaging.python.org/en/latest/guides/installing-using-pip-and-virtual-environments/#create-and-use-virtual-environments

Starting with Python 3.13, we implement PEP 668: https://packaging.python.org/en/latest/specifications/externally-managed-environments/#externally-managed-environments This is a layer of protection which prevents common problems which can arise when pip is allowed to freely install in to the base package namespace.

* Using pip with the system package namespace can break packages delivered via yum. For instance, a package can be upgraded to a version which breaks compatibility with another system package.
* In addition, yum upgrades will indiscriminately replace any modified Python packages, so if you upgrade the package with pip and we rebuild it to patch a bug, yum will downgrade it.

As Jack said, always best to work in a virtual environment.

From: OpenSource <opensource-bounces@xxxxxxxxxxxxxxxxxx> on behalf of stefan@xxxxxxxxxx <stefan@xxxxxxxxxx>
Date: Saturday, March 22, 2025 at 1:00 PM
To: 'IBMi Open Source Roundtable' <opensource@xxxxxxxxxxxxxxxxxx>
Subject: [EXTERNAL] Re: [IBMiOSS] Do worry - Python newbie calling
Thanks Jack, will try to read up on virtual environments.
Need to find a solution that works in a production environment.

Best regards

Stefan

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Stefan Tageson
+46 732 369934
stefan@xxxxxxxxxx

-----Original Message-----
From: OpenSource <opensource-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of Jack Woehr via OpenSource
Sent: Saturday, March 22, 2025 6:58 PM
To: 'IBMi Open Source Roundtable' <opensource@xxxxxxxxxxxxxxxxxx>
Cc: Jack Woehr <jack.woehr@xxxxxxxxxxx>
Subject: Re: [IBMiOSS] Do worry - Python newbie calling

Always. Work. In. A. Virtual. Environment.

________________________________
From: OpenSource <opensource-bounces@xxxxxxxxxxxxxxxxxx> on behalf of stefan@xxxxxxxxxx <stefan@xxxxxxxxxx>
Sent: Saturday, March 22, 2025 11:55
To: 'IBMi Open Source Roundtable' <opensource@xxxxxxxxxxxxxxxxxx>
Subject: Re: [IBMiOSS] Do worry - Python newbie calling

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Hi Craig,
When doing so I still get the same problem:
# python -m pip install xlsxwriter
error: externally-managed-environment

Jack Woehr
Independent Consulting Programmer

303-847-8442

jack.woehr@xxxxxxxxxxx

www.procern.com<http://www.procern.com>

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