參考https://docs.opencv.org/4.1.0/d5/de5/tutorial_py_setup_in_windows.html
方法一：到官網上https://www.python.org/downloads/windows/，下載對應的installer，雙擊即可
缺點：
Problem is that, there is no official 64-bit binaries of Numpy.
You have to build it on your own. For that, you have to use the same compiler used to build Python.
When you start Python IDLE, it shows the compiler details. You can get more information here.
So your system must have the same Visual Studio version and build Numpy from source.
方法二：直接安裝anaconda(https://www.anaconda.com/distribution/).
Anaconda指的是一個開源的Python發行版本，其包含了conda、Python等180多個科學包及其依賴項.