Python: Could Not Install Packages Due to an Oserror: [Errno 2] No Such File or Directory

I had exactly the same issue installing this package on my Windows laptop - then read of the 260 character limit. I followed this guide - and after rebooting, successfully installed 'sklearn':

Run CMD in administrator mode and enter:

pip install sklearn --user

and Done!!

Try sudo pip install 'package name' --user

I removed and reinstalled Python and then entered this into my terminal command line:

pip install --trusted-host pypi.org --trusted-host files.pythonhosted.org pip install --upgrade pip

and it fixed my issue.

pip install --trusted-host pypi.org --trusted-host files.pythonhosted.org pip install

and it should work.

If Windows is 8.
You need to change your access policy inside Python3 repository where all packages, including PIP.

"Properties" -> "Security" -> select a user -> select "Change" and everything below.
Next, update PIP (py -m pip install --upgrade pip) and install the packages inside ENV

Fixed by doing

conda install google-pasta

this directory under envs/xxxx/Lib/site-packages/ was not having METADATA. Likely to be partial installation.

keep package up to date.I upgarde my pip and the problem is gone.