flake8_expression_assignments

A flake8 plugin that disallows assignment expressions.

Installation

pip install flake8_assignment_expressions

Flake8 codes

Code	Description
ASE101	Line contains assignment expression

Why

Assignment expressions/the walrus operator was introduced in Python 3.8. If you want to keep assignment expressions out of your own or your companies' repositories, use this plugin.

This plugin will encourage you to rewrite code like

import os

if environment := os.getenv("ENVIRONMENT"):
    print(f"You are currently on the {environment} environment.")

into

import os

environment = os.getenv("ENVIRONMENT")
if environment:
    print(f"You are currently on the {environment} environment.")

Running as a pre-commit hook

See pre-commit for instructions.

Sample .pre-commit-config.yaml:

-   repo: https://github.com/pycqa/flake8
    rev: 4.0.1
    hooks:
    -   id: flake8
        additional_dependencies: [flake8_assignment_expressions]