命令提示中的Python路径

Question

I had Python3 installed on my computer after Python2. Then I executed "python" in command prompt, Python3 showed up. How does the command prompt find Python without specifying the path? Can I switch it back to Python2 without reinstalling?

Answer 1

If you are on windows you need the python27 to be first in your PATH enviroment variable

PATH=c:\python27;otherstuff...;c:\python35;...;

or just write

py -2

To start python2