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Path: news.eternal-september.org!eternal-september.org!feeder3.eternal-september.org!fu-berlin.de!uni-berlin.de!not-for-mail From: Grant Edwards <grant.b.edwards@gmail.com> Newsgroups: comp.lang.python Subject: Re: Pip installs to unexpected place Date: Wed, 16 Apr 2025 10:38:31 -0400 (EDT) Lines: 30 Message-ID: <mailman.13.1744814312.3008.python-list@python.org> References: <CAApdmf2J69WgkR159sBSkxN0=mYoNmHZYboBmpPi+LdA-YBNpg@mail.gmail.com> <CAN06=CxPNLHtr_sdgphR2jrN1V+WbB8wZDJdbvfEDb-MYtmPHA@mail.gmail.com> <bbe32f47-13d2-459c-af22-4e0e37834091@tompassin.net> <4ZcdYR5WnWznV1q@mail.python.org> <cc1c6cf5-f8b9-4528-b6b0-110499b88162@wichmann.us> <4Zd3YM00SYznVKQ@mail.python.org> X-Trace: news.uni-berlin.de jrKb0wvCJq76GUaRhLzpSQTTn/tup9iXAhS8F4u58yqQ== Cancel-Lock: sha1:mVR2GvXaETOUkJyj+eJl+VGz/o8= sha256:WBhqPf5iwQI2o/4etamUHEBnqwWRF6rAZhGPI920Er0= Return-Path: <grant.b.edwards@gmail.com> X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org Authentication-Results: mail.python.org; dkim=none reason="no signature"; dkim-adsp=none (unprotected policy); dkim-atps=neutral X-Spam-Status: OK 0.006 X-Spam-Evidence: '*H*': 0.99; '*S*': 0.00; 'pip': 0.04; 'linux,': 0.07; 'insist': 0.09; 'install,': 0.09; 'user.': 0.09; 'that.': 0.15; 'flag': 0.16; 'from:addr:grant.b.edwards': 0.16; 'from:name:grant edwards': 0.16; 'mats': 0.16; 'packages,': 0.16; 'privileges': 0.16; 'wichmann': 0.16; 'wrote:': 0.16; 'python': 0.16; 'grant': 0.17; 'admin': 0.19; 'installing': 0.19; 'to:addr :python-list': 0.20; "i've": 0.22; 'version': 0.23; 'install': 0.23; 'installed': 0.23; 'run': 0.23; 'saying': 0.25; 'stuff': 0.25; 'space': 0.26; 'so.': 0.26; '>>>': 0.28; 'header:User- Agent:1': 0.30; 'program': 0.32; 'python-list': 0.32; 'but': 0.32; 'package': 0.34; 'from:addr:gmail.com': 0.34; 'yes,': 0.35; 'possibly': 0.36; "it's": 0.37; 'use': 0.39; "that's": 0.39; 'break': 0.39; 'wants': 0.40; 'want': 0.40; 'tell': 0.60; 'true': 0.63; 'your': 0.64; 'message-id:invalid': 0.69; 'little': 0.73; 'breaking': 0.78; 'imports': 0.84; 'system).': 0.84; 'warning': 0.84 User-Agent: slrn/1.0.3 (Linux) X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.39 Precedence: list List-Id: General discussion list for the Python programming language <python-list.python.org> List-Unsubscribe: <https://mail.python.org/mailman/options/python-list>, <mailto:python-list-request@python.org?subject=unsubscribe> List-Archive: <https://mail.python.org/pipermail/python-list/> List-Post: <mailto:python-list@python.org> List-Help: <mailto:python-list-request@python.org?subject=help> List-Subscribe: <https://mail.python.org/mailman/listinfo/python-list>, <mailto:python-list-request@python.org?subject=subscribe> X-Mailman-Original-Message-ID: <4Zd3YM00SYznVKQ@mail.python.org> X-Mailman-Original-References: <CAApdmf2J69WgkR159sBSkxN0=mYoNmHZYboBmpPi+LdA-YBNpg@mail.gmail.com> <CAN06=CxPNLHtr_sdgphR2jrN1V+WbB8wZDJdbvfEDb-MYtmPHA@mail.gmail.com> <bbe32f47-13d2-459c-af22-4e0e37834091@tompassin.net> <4ZcdYR5WnWznV1q@mail.python.org> <cc1c6cf5-f8b9-4528-b6b0-110499b88162@wichmann.us> On 2025-04-16, Mats Wichmann via Python-list <python-list@python.org> wrote: > On 4/15/25 16:07, Grant Edwards via Python-list wrote: >> On 2025-04-15, Thomas Passin via Python-list <python-list@python.org> wrote: >> >>> On Linux, at least, it's standard for pip to install into the user's >>> site-packages location if it's not invoked with admin privileges - even >>> without --user. Pip will emit a message saying so. Well, that used to be >>> true but nowadays Pip wants you to use the --break-system-packages flag >>> if you want to insist on installing into the system's Python install, >>> even if it's going to go into --user. >> >> I've always been a little baffled by that message when installing with >> --user. How can that possibly break system stuff? > > Your user install dir is in your python path, so when you go to run an > installed Python program which imports other packages, it might pick up > the version you have in your user space rather than the system one it > was tested with. Yes, I understand that. But that's breaking stuff for the user not for the system. Of course installing stuff for the user can break stuff for the user. I don't need a warning to tell me that. Also... when installing stuff with pip --user, it is always a package that is not installed for the system (usually not even available for the system). How can that "break system packages"? -- Grant