NameError name multiprocessing is not defined

The error message "NameError: name 'multiprocessing' is not defined" indicates that the module multiprocessing has not been imported in the current context.

To resolve this error, you need to import the multiprocessing module at the beginning of your code. Here's an example:

import multiprocessing

# Rest of your code...

After importing the module, you can use its functions and classes in your code without encountering the NameError.