[Distutils] Proposal: "Install and save"

[Alex Grönholm]

I'm -1 on this because requirements.txt is not really the standard way 
to list dependencies.
In the Python world, setup.py is the equivalent of Node's package.json. 
But as it is
Python code, it cannot so easily be programmatically modified.

22.07.2016, 20:48, Chris Angelico kirjoitti:
> In teaching my students how to use third-party Python modules, I
> generally recommend starting every project with "python3 -m venv env",
> and then install dependencies into the virtual environment. They then
> need a requirements.txt to keep track of them. There are two workflows
> for that:
>
> $ pip install flask
> $ pip freeze >requirements.txt
>
> or:
>
> $ echo flask >>requirements.txt
> $ pip install -r requirements.txt
>
> Over in the JavaScript world, npm has a much tidier way to do things.
> I propose adding an equivalent to pip:
>
> $ pip install --save flask
>
> which will do the same as the second option above (or possibly write
> it out with a version number as per 'pip freeze' - bikeshed away). As
> well as cutting two commands down to one, it's heaps easier in the
> multiple installation case - "pip install --save flask sqlalchemy
> gunicorn" is much clearer than messing around with creating a
> multi-line file; and the 'pip freeze' option always ends up listing
> unnecessary dependencies.
>
> Thoughts?
>
> ChrisA
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