将软件包安装到python虚拟环境中

Question

I know this question sounds silly, but I can not find a detour in a short time. I understand that to download packages into python you either use:

pipenv install <package-name>

or

pipenv install <wheel-name.whl>

Now, I want to install sklearn into pipenv environment so that I can later upload it to Amazone. I tried to install sklearn using pipenv install sklearna and another using the wheel provided from https://www.lfd.uci.edu/~gohlke/pythonlibs/ . It's installed, but once I open the installed requirements using:

pipenv lock -r > requirements.txt

I got the following long name for sklearn:

-i https://pypi.org/simple
./sklearn_contrib_py_earth-0.1.0-cp36-cp36m-win_amd64.whl
joblib==0.14.0
numpy==1.17.4
pandas==0.25.3
python-dateutil==2.8.1
pytz==2019.3
scikit-learn==0.21.3
scipy==1.3.3
six==1.13.0

Why I don't get the same name as the one defined above, ie, the name of the package not it's wheel.

Answer 1

It's because you installed it from the .whl file instead of from pypi.

The requirements.txt lists the exact version of a package you have installed. If it was to list something like:

sklearn==0.4.0

That would be incorrect as you installed your own version, which for all pip knows, could be a different package or version.

If you can't install sklearn from pypi then you will need to make sure the .whl file is in the directory you are running pip from.

This can be a common occurance on Windows, I for instance have to do the same thing with MySQLClient.

Just drop the .whl file into your directory and run the following from within an activated venv:

py -m pip install -r requirements.txt