安装multiprocessing报错

Try to run this command from the system terminal. Make sure that you use the correct version of ‘pip’ installed for your Python interpreter located at ‘D:\quant\venv\Scripts\python.exe’.

解决方法：
1、pip install wheel
2、cmd python 中查看版本型号
3、https://www.lfd.uci.edu/~gohlke/pythonlibs/
在此网址中寻找对应的（通常为Python的版本，win32 o rwin64）所要的包，并下载
4、cmd cd至*.whl 锁在的文件夹 pip install .whl

C:\Users\DELL\Downloads>pip instal multiprocess-0.70.12.2-cp37-cp37m-win32.whl
ERROR: unknown command “instal” - maybe you meant “install”

C:\Users\DELL\Downloads>pip install multiprocess-0.70.12.2-cp37-cp37m-win32.whl
ERROR: multiprocess-0.70.12.2-cp37-cp37m-win32.whl is not a supported wheel on this platform.

C:\Users\DELL\Downloads>python
Python 3.7.1 (v3.7.1:260ec2c36a, Oct 20 2018, 14:57:15) [MSC v.1915 64 bit (AMD64)] on win32
Type “help”, “copyright”, “credits” or “license” for more information.

exit()

C:\Users\DELL\Downloads>pip install multiprocess-0.70.12.2-cp37-cp37m-win_amd64.whl
Processing c:\users\dell\downloads\multiprocess-0.70.12.2-cp37-cp37m-win_amd64.whl
Requirement already satisfied: dill>=0.3.4 in d:\vnstudio\lib\site-packages (from multiprocess==0.70.12.2) (0.3.4)
multiprocess is already installed with the same version as the provided wheel. Use --force-reinstall to force an installation of the wheel.