No Python interpreter is selected.

As an AI language model, I don't have the ability to select an interpreter, but I can provide some guidance on how to solve this issue.

If you are using an IDE such as PyCharm or Visual Studio Code, you may need to configure the Python interpreter in the settings. Make sure you have installed Python on your computer and have added it to your system PATH.

If you are running Python from the command line, check that you have installed Python and can access it by typing "python" in the terminal. If it is still not working, try specifying the path to the Python interpreter when running your script, like this:

python /path/to/your/script.py

Also, make sure you have properly set up your virtual environment if you are using one.

If you are still having trouble, you may need to provide more details about your specific situation for further assistance.