Visual Studio Code Import “flask“ could not be resolvedPylance

First of all, I use Visual Studio Code to edit the python code.
1. Check whether the phenomenon is the same as what I encountered. There are wavy lines under the flask

Run in the TERMINAL window of Visual Studio Code: pip --version
View the package installed by pip is placed in python 3.10, as shown in the figure below

3. And the python version used by my Visual Studio Code is: 3.11.1
   
   So, need to change from 3.11.1 to 3.10

Click on 3.11.1 64-bit in the lower right corner of step 3

A window will appear on the upper part of the window,
click on the blue part, my blue part is Practices ~\Desktop
5. Click on the entry with the words "Recommended" with a five-pointed star, and change from 3.11.1 to 3.10.9

6.
After clicking to 3.10.9,
the lower right corner changes from the original 3.11.1 to the current 3.10.9
and then look at the above code flask, there is no longer a yellow wavy line and an error.

Summary: The error of Import “flask” could not be resolvedPylance
appeared , which was caused by the inconsistency between the version of python used by Visual Studio Code and the version used by the pip installation package. It can be changed to the same version as the version used by pip through the above method Encoded normally.