Catalog

• 1 see Python edition
• 2 Set call name
• 3 demonstration
• 4 application

Tips ： Here you can add the general content to be recorded in this article ：

There are several versions installed in the computer Python, Plus the integrated environment …… This article is a record .

【 System environment 】
Win7-64

Tips ： The following is the main body of this article , The following cases can be used for reference

1 see Python edition

There are three major versions ：Python 2,Python 3.8 and PyPy Of 3.8.12. because PyPy There are multiple callable names under the installation directory of , So it all shows . In fact, it is a program .

2 Set call name

1. Because in the system environment variable settings ,Python 2 Put the directory in front , therefore cmd type Python, Just call Python 2
2. because PyCharm Of Terminal And cmd identical , So type Python, Also call Python 2
3. take Python 3.8 Install under directory Python.exe Rename it to Python3.exe, type Python3 Directly callable

3 demonstration

4 application

1. After distinguishing , Can be in different Python Use on version pip Command line .
   

2. The same command line is on a different Python All versions are applicable
   

3. It's fine too In different Python Run scripts in version .

4. Each installation is different Python edition , In addition to adding the installation directory PATH, You should also install the \Scripts\ Path join PATH. This is necessary , essential ！

5. Unexpectedly, it calls Anaconda Integrated Python, What a surprise ！