pymport

About

A lightweight Python linter for checking unused imports in your Python files.

Features

• 🧹 Detects unused or shadowed imports that linters like ruff may miss
• 🚫 Use noqa comments to ignore imports you want to keep
• ⚙️ Minimalist CLI interface for easy integration in CI/CD pipelines
• 🐍 No external dependencies beyond the Python standard library
• ✅ 100% test coverage with automated tests
• 🔌 Provides pre‑commit hook integration for automated checks

Important

False positives

This tool is not possible to assure a 100% false positive free result due to the possible collateral execution effects when importing a module. This is, importing a module can affect or enable some feature needed somewhere else, so not using anything from that imported package/module does not necessarily mean is not needed.

A minimal typical example could be:

import os.path

print(os.curdir)

📦 Installation

To install pymport using pip, run the following command:

pip install pymport --upgrade

⚡ Quick Start

To run the linter on the current directory, use the following command:

pymport .

• This will check all Python files in the current directory and its subdirectories.

Command-Line Interface

Usage: pymport [FILE] [--help] [--quiet] [--ignore=DIR]

Argument / Option	Description
[FILE]	Files or directories to lint. (Need at least one file or dir to check.)
[--help]	Show help message and exit.
[--quiet]	Decrease verbosity.
[--ignore]	Directory basename to ignore. Can be used multiple times.

Tip

Ignoring Unused Imports

Use a comment like # noqa: F401(or just # noqa) at the end of the import line to ignore specific unused imports.

Use same error code (F401) as Pyflakes, Ruff

Output

When unused imports are detected, they will be reported in the following format:

path/to/file.py:LINE-NUMBER: UNUSED-IMPORT-NAME

Note

• Exit code 0 means no unused imports were found; exit code 1 indicates that unused imports were detected.
• When no unused imports are found, success message is printed, unless --quiet is used.

Pre‑commit Integration

The linter can be easily integrated into your pre‑commit workflow.

Update your .pre-commit-config.yaml to include the pymport hook:

repos:
  - repo: https://github.com/rmoralespp/pymport
    rev: 0.0.6  # Use the latest commit hash or tag
    hooks:
      - id: pymport
        args: ["."]  # customize as needed
        pass_filenames: false  # needed if excluding files with --ignore

🛠️ Development

To contribute to the project, you can run the following commands for testing and documentation:

First, ensure you have the latest version of pip:

python -m pip install --upgrade pip

Running Tests

pip install --group=test --upgrade # Install test dependencies, skip if already installed
python -m pytest tests/ # Run all tests
python -m pytest tests/ --cov # Run tests with coverage

Running Linter

pip install --group=lint --upgrade  # Install lint dependencies, skip if already installed
ruff check . # Run linter

🗒️ License

This project is licensed under the MIT license.