[PyCharm] Solve the problem that pip cannot be used after creating a new virtual environment

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1.Problem description and solution

• When creating or opening a project in PyCharm, we need to select a python interpreter. If we choose to create a new virtual environment, as shown in the figure below:

• After entering the project, we open the terminal and see that we have automatically entered the virtual environment:

• However, if we try to use the pip command, an error will be reported , as shown in the figure:

• At this time, we only need to delete the folder in the picture :

• Then try using the pip command again:

• You can see that pip can be used normally!
• Since I inherited the global site, I have a lot of packages here

2. Use of virtual environment

2.1 Features

• Installing packages in a virtual environment does not affect global packages at all
• Virtual environments are free to use global packages as long as they choose to inherit the global site
• As shown in the picture, I installed scipy in the virtual environment, but this package is not available globally:

2.2 Entry and exit

Enter

<project-path>/venv/Scripts/activate

quit

<project-path>/venv/Scripts/deactivate