name 'as_strided' is not defined

The error message "name 'as_strided' is not defined" usually means that the module or function that defines the "as_strided" function has not been imported or is not available in the current scope.

The "as_strided" function is part of the NumPy library, so you need to make sure that you have imported the NumPy library before using this function. You can import NumPy by adding the following line of code at the beginning of your script:

import numpy as np

If you have already imported NumPy and are still getting this error, make sure that you are calling the function with the correct syntax and arguments. You can refer to the NumPy documentation for more information on how to use the "as_strided" function.