[FIXED] Is it possible to force a Python library to install a specific version of one of its dependency?

Issue

I would like to install scikit-learn==0.24.0 and scipy==1.7.1 which is one of its dependencies. Scikit-learn needs a version of scipy that is >=0.19.1.

I have the following requirements.txt :

scipy==1.7.1
scikit-learn==0.24.0

So,

1. it downloads scipy 1.7.1
2. it downloads scikit-learn 0.24.0.
3. It downloads scipy again with the 1.7.3 version

Version of Python: 3.7 Version of Pip: 18.1

I would like to have scipy download only the first time. How can it be done?

Solution

Got it.

It was due to pip.

With pip 18.1, it doesn't work. With pip 21.3, it works.

I have upgraded pip.

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Answered By - Nastasia