inconsistent use of tabs and spaces in indentation.

Inconsistent use of tabs and spaces in indentation can lead to readability issues and errors when working with Python code that relies on proper formatting for block structure. According to PEP 8, the official style guide for Python, it's recommended to consistently use spaces for indentation[^4]. Here's an example:

# Incorrect indentation (mixing tabs and spaces):
if condition:
    do_something()
else:
   do_something_else()

# Correct indentation using spaces only:
if condition:
    do_something()
else:
    do_something_else()

When you mix tabs and spaces, text editors or linters may interpret them differently, causing syntax errors or making the code look messy. To avoid this, ensure your editor is set up to automatically convert mixed indentations to a single type, either tabs or spaces.

To fix inconsistencies, you can use tools like `black` or `autopep8` which automatically format your code to adhere to PEP 8 standards[^5].