Python Matplotlib 'SyntaxError: not a PNG file' Error: Troubleshooting Guide

The error message 'SyntaxError: not a PNG file' indicates that the file '1.png' is not a valid PNG image file. The code is trying to read the image using the imread function from the matplotlib library, but it encountered a syntax error because the file is not in the expected format.

To fix this issue, you can try the following solutions:

1. Double-check that the file '1.png' exists in the specified location and make sure it is a valid PNG image file. You can try opening the file manually to confirm its format.

2. If the file is not a PNG image, you can convert it to a PNG format or use the appropriate function to read the specific image format.

3. If the file is indeed a PNG image but still causing the error, it might be corrupted. Try opening the image in an image viewer to verify its integrity.

By addressing these possibilities, you should be able to resolve the 'SyntaxError: not a PNG file' issue.