Install pyserial

Hi, I intend to run the Python serial program in the Python Interactor. The Serial module was installed, and then I was prompted to install the PySerial module with the information shown below.
pyserial

This was the case for both 4.12 and 4.13. Import the PySerial module are prompted without this module. Running Python serial programs also report errors. How do I install the PySerial module?
run python