Optimize main.py

Optimization

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Code Optimization is a practice to make the code more efficient, use less resources while producing the right results.

It has the benefits of:

• Speed up the app performance
• Make the code cleaner and readable
• Simplify for error tracking and debugging
• Save computational power

Many tools are created to help Python developer to optimize the code. For the most optimum result, simply combine the tools by chaining them.

Here, I just share a few tools that help in highlighting any Unused Imports:

1. flake8 - To detect unused imports.
2. autoflake - To remove unused imports.
3. isort - To sort and organize imports.
4. pylint - To analyze code for other issues, including unused imports.

Use these tools together can keep the main.py cleaner, optimized, and free of unnecessary imports.

Use flake8

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flake8 is a popular tool for checking Python code style and errors. With the flake8-unused-import plugin, we can detect unnecessary imports.

First, is to install flake8.

$ pip install flake8

Then, just run the tool with:

$ flake8 main.py
main.py:4:1: F401 'sys' imported but unused

Use autoflake

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autoflake is a great tool to remove unused imports and variables automatically.

First, is to install autoflake.

$ pip install autoflake

And, run autoflake to check and fix unused imports in main2.py:

$ autoflake --check main2.py
$ autoflake --remove-unused-variables --remove-all-unused-imports --in-place main2.py

Use isort

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isort is a tool that sorts and organizes imports to follow best practices. It can:

• remove duplicate imports.
• group standard library, third-party, and local imports.
• ensure consistent import order.

Simply, install and run it with:

$ pip install isort
$ isort main3.py

Use pylint

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pylint is a comprehensive static code analysis tool that also detects unused imports.

First, install pylint.

$ pip install pylint

Then, run pylint and looks for unused-import warnings in the output.

$ pylint main3.py | grep unused
main3.py:4:0: W0611: Unused import sys (unused-import)

Optimum Results

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For best results, simply chains the commands together:

$ autoflake --remove-all-unused-imports --in-place main4.py && isort main4.py && pylint main4.py