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Comments on Automatically install all packages needed
Automatically install all packages needed
When running various Python scripts, I often need to do this annoying dance:
$ python script.py ... ModuleNotFoundError: No module named 'foo' $ pip install foo $ python script.py ... ModuleNotFoundError: No module named 'bar' $ pip install bar $ python script.py ... ModuleNotFoundError: No module named 'baz' $ pip install baz $ python script.py (correct output from script)
Yes, I know this can be solved by creating a
requirements.txt file, packaging the script, etc. But I'm asking about cases where that ship has sailed. All I have is a script that optimistically imports stuff.
Python already knows what package it's supposed to be, since it's named in the
ModuleNotFoundError. Is there a way to tell Python to react by attempting a
pip install on that, rather than raising an exception?
I am aware that:
ModuleNotFoundErrormay raise not just for missing packages, but also modules (eg.
foo.py) in the same directory. I'm happy with a solution that blindly assumes it's always PyPi packages.
Some packages use a different name for
import. I'm happy with a solution that fails or installs the wrong package in this case.
- It is dangerous to blindly install packages from PyPi. I'm okay with the risks.