Python SyntaxError: invalid syntax - Missing Comma in Icon Assignment

The error message 'SyntaxError: invalid syntax' usually indicates a problem with the structure of your code. In this specific case, the error points to a missing comma after the icon_name assignment in line 42 of your demo.py file.

To resolve this, you need to add a comma after the icon_name assignment statement. Here's an example of the corrected code:

icon_name = 'fas fa-balance-scale',  # 图标名称，fas fa-apple-alt

Remember to check the code surrounding the error as well, as other syntax errors might be present. By adding the comma and ensuring correct syntax, you can resolve the 'invalid syntax' error and get your Python code running correctly.