[Python-ideas] install pip packages from Python prompt

[Terry Reedy]

On 11/1/2017 3:06 AM, Terry Reedy wrote:
> On 11/1/2017 1:25 AM, Nick Coghlan wrote:
>> On 1 November 2017 at 08:50, Terry Reedy <tjreedy at udel.edu 
>> <mailto:tjreedy at udel.edu>> wrote:
>>
>>     In April 2016, after posting the idea to pydev list and getting 'go
>>     ahead's from Nick Coughlin and someone else, with no negatives, I
>>     approved Upendra Kumar's GSOC proposal to write a pip gui.  This was
>>     https://bugs.python.org/issue27051
>>     <https://bugs.python.org/issue27051>.  On June 20, Ned Deily and
>>     Nick Coughlin vetoed adding a pip gui anywhere in the stdlib since
>>     it depended on something not in the stdlib, and perhaps for other
>>     reasons I don't fully understand.
>>
>>
>> Clarifying the objection here (since the linked issue is a fairly long 
>> one): what I'm against is tightly coupling the pip-gui development & 
>> release process to the CPython development & release process when we 
>> don't have any compelling reason to do so.
> 
> Thank you for clarifying. This is a reason that I did not understand ;-).
> 
>> Given an independently released pip-gui on PyPI (with its own version 
>> numbering and release cadence), then I'd be +1 on bundling that as an 
>> optional IDLE addon, ensurepip style.
> 
> I already agree in my second response on this thread that pip gui should 
> be on pypi.
> 
> A pip gui would be a pip add-on, not an IDLE add-on, just as turtledemo 
> is a turtle add-on even though one can invoke it from the IDLE menu -- 
> as long as turtle and turtledemo are installed.
> 
> Issue 27051, write pip gui, is properly a separate issue from 
> https://bugs.python.org/issue23551, start a pip gui, if and when 
> available, from IDLE menu.  I am against 'tightly coupling' something to 
> IDLE when there is 'no compelling reason to do so'.

When pip installs a package into site_packages, does it at any point run 
  package-specific installation code?  setup.py?  More specifically, can 
pip install an IDLE extension. If so, I think installing pipgui should 
add 'x_pipgui.py' to idlelib, if it exists, and add a section to 
idlelib/config-extension.def.  Using the existing extension mechanism 
would be an alternative to patching IDLE to conditionally add pipgui to 
some menu.

-- 
Terry Jan Reedy