Check if the python-tk package is installed.

To check if the python-tk package is installed on your system, you can run the following command in your terminal or command prompt:

For Linux-based systems:

dpkg -l | grep python-tk

For macOS:

brew list | grep python-tk

For Windows:

pip list | findstr python-tk

If the package is installed, you should see its name and version number in the output. If the package is not installed, you can install it using your system's package manager. For example, on Ubuntu, you can install the package using the following command:

sudo apt-get install python-tk

After installing the package, you should be able to use the required plotting functionality in Python without any issues.