On Tue, Jan 5, 2021 at 1:52 AM Calvin Spealman <cspea...@redhat.com> wrote: > > > > On Mon, Jan 4, 2021 at 9:47 AM Chris Angelico <ros...@gmail.com> wrote: >> >> On Tue, Jan 5, 2021 at 1:42 AM Abdur-Rahmaan Janhangeer >> <arj.pyt...@gmail.com> wrote: >> > >> > Greetings list, >> > >> > put simply, >> > >> > be able to use >> > >> > $ python -m venv venv_name activate >> > >> > To activate an env instead of having each platform have a way of >> > handling it >> > >> >> Unfortunately, that wouldn't work. Activating a virtual environment >> means setting some env vars in the current shell, and Python is >> fundamentally unable to do that - it can only be done within the shell >> itself (by sourcing a script). >> >> You can, of course, simply run the Python executable from that venv, >> but activation is *by its nature* a shell feature, and will differ by >> shell. > > > This is true, but... > it might be possible to include something more like pipenv's "shell" which > spawns a new instance of your shell with the right paths. It effectively > achieves the same goal, without needing to source, >
Hmm. In terms of guaranteeing consistency, I'm not sure it's really any better - what if it picks the wrong shell, or (worse) the right shell with slightly different settings? The normal activation method is pretty simple: set three environment variables (including PATH), and change the prompt. Spawning a separate shell would require correctly matching the behaviour of the current shell. Plus, I'm not really a fan of spawning unnecessary shell levels, which you then end up exiting out of as a stack. But if a separate "python3 -m venv env shell" command were to exist, I'm sure it would have some use. It shouldn't be considered activation, but a completely separate feature with some similar use-cases. (Though I wouldn't use it, myself.) ChrisA _______________________________________________ Python-ideas mailing list -- python-ideas@python.org To unsubscribe send an email to python-ideas-le...@python.org https://mail.python.org/mailman3/lists/python-ideas.python.org/ Message archived at https://mail.python.org/archives/list/python-ideas@python.org/message/FZNUDCTKNI4WK4N4UOQM5TY5WP5QADTN/ Code of Conduct: http://python.org/psf/codeofconduct/
