No module named 'multiprocessing'

The error "No module named 'multiprocessing'" typically occurs when the `multiprocessing` module is not installed or cannot be found by the Python interpreter.

To resolve this issue, you can try the following steps:

1. First, make sure you have the latest version of Python installed on your system. You can download it from the official Python website (https://www.python.org/).

2. If you have multiple versions of Python installed, ensure that you are using the correct version by running `python --version` in your command prompt or terminal.

3. If you're using a virtual environment, activate it before proceeding.

4. Install the `multiprocessing` module by running the following command in your command prompt or terminal:

   pip install multiprocessing

5. If you're using Anaconda, you can try installing `multiprocessing` using the following command:

   conda install -c conda-forge multiprocessing

Once the installation is complete, you should be able to import and use the `multiprocessing` module without any errors.