ModuleNotFoundError: No module named 'png' - Python

When running a Python script or program, you may encounter the following error message:

ModuleNotFoundError: No module named 'png'

This error indicates that your script is trying to import a module called 'png', but Python cannot find such module in its list of installed modules. There are a few reasons why you might be seeing this error:

1. The 'png' module is not installed on your system.
2. The 'png' module is installed, but not in the Python environment you are running your script.
3. The name of the module is misspelled, or does not exist.

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

1. Check if the 'png' module is installed on your system. You can do this by opening a terminal window/command prompt and running the following command:

pip list | grep png

This command will list all the installed modules that contain the string 'png'. If the 'png' module is not listed, you can install it by running the following command:

pip install pypng

2. If the 'png' module is already installed, but not in the Python environment you are running your script, you can try adding the module's path to your Python's sys.path list:

import sys
sys.path.insert(0, '/path/to/png/module')

3. If you have confirmed that the module is installed and the path is correct, check that the module name is spelled correctly and that it exists. You can do this by looking at the import statement in your script, and checking it against the module's documentation.

In conclusion, the 'ModuleNotFoundError: No module named 'png'' error can be resolved by either installing the 'png' module, adding it to your Python environment, or confirming that the module name and path are correct.