Error when trying to download mysql in a trial django project
In order to use pip or pip3 in Windows operating system ; 

PYTHONPATH system variable should be added to environment variables for the path of
python.exe file such as
C:\Users\pc\AppData\Local\Programs\Python\Python36\
PATH system variable should be edited by adding new paths such as
C:\Users\pc\AppData\Local\Programs\Python\Python36\ and 
C:\Users\pc\AppData\Local\Programs\Python\Python36\Scripts\

Then, both of the variables might be checked whether they're set from command line by 
C:\Users\pc>echo %PYTHONPATH% and C:\Users\pc>echo %PATH%
when I enter this line pip3 install mysqlclient it gives me this error :

ERROR: Command errored out with exit status 1:

this happened after I tried using pip install mysqlclient