Python packages hash not matching whilst installing using pip

Question

I am using pip to install all my python packages but get error as shown in the trace below. What is the problem and how can I solve it?

usr@comp:~$ pip insta         


        

Answer 1

--no-cache-dir did not work for me in raspberry pi 4 at first.

Found that the problem was due to unexpected network change/failure during pip installation

I had to download the broken .whl file manually with wget

and install it like below: sudo pip install scipy-1.3.0-cp37-cp37m-linux_armv7l.whl

followed by sudo pip install --no-cache-dir keras

Then it worked.