[Python-ideas] install pip packages from Python prompt

[Stephan Houben]

Hi Alex,

2017-10-29 20:26 GMT+01:00 Alex Walters <tritium-list at sdamon.com>:

>         return “Please run pip from your system command prompt”
>
>
>

The target audience for my proposal are people who do not know
which part of the sheep the "system command prompt" is.

Stephan


>
>
>
>
> *From:* Python-ideas [mailto:python-ideas-bounces+tritium-list=sdamon.com@
> python.org] *On Behalf Of *Stephan Houben
> *Sent:* Sunday, October 29, 2017 3:19 PM
> *To:* Python-Ideas <python-ideas at python.org>
> *Subject:* [Python-ideas] install pip packages from Python prompt
>
>
>
> Hi all,
>
> Here is in somewhat more detail my earlier proposal for
>
> having in the interactive Python interpreter a `pip` function to
>
> install packages from Pypi.
>
> Motivation: it appears to me that there is a category of newbies
>
> for which "open a shell and do `pip whatever`" is a bit too much.
>
> It would, in my opinion, simplify things a bit if they could just
>
> copy-and-paste some text into the Python interpreter and have
>
> some packages from pip installed.
>
> That would simplify instructions on how to install package xyz,
>
> without going into the vagaries of how to open a shell on various
>
> platforms, and how to get to the right pip executable.
>
> I think this could be as simple as:
>
>   def pip(args):
>       import sys
>       import subprocess
>       subprocess.check_call([sys.executable, "-m", "pip"] + args.split())
>
>       print("Please re-start Python now to use installed or upgraded
> packages.")
>
> Note that I added the final message about restarting the interpreter
>
> as a low-tech solution to the problem of packages being already
>
> imported in the current Python session.
>
> I would imagine that the author of package xyz would then put on
>
> their webpage something like:
>
>   To use, enter in your Python interpreter:
>
>      pip("install xyz --user")
>
> As another example, consider prof. Baldwin from Woolamaloo university
>
> who teaches a course "Introductory Python programming for Sheep Shavers".
>
> In his course material, he instructs his students to execute the
>
> following line in their Python interpreter.
>
>    pip("install woolamaloo-sheepshavers-goodies --user")
>
> which will install a package which will in turn, as dependencies,
>
> pull in a number of packages which are relevant for sheep shaving but
>
> which have nevertheless irresponsibly been left outside the stdlib.
>
> Stephan
>
>
>
>
>
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