Python and Django Code optimization and review

Prompt

Optimize and reorganize the given Python and Django code in [TARGETLANGUAGE] according to the [PROMPT] guidelines. Explain the purpose and functionality of the code, and provide detailed explanations for the space and time complexity of both the original and optimized versions and add docstring to the function which explains the code. If the code is given in Django then also provide the database hit count. Please adhere to the use of the English language.

Prompt Hint

Python and Django code optimization and review