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scant

CI image image

Find the Python dependencies you barely use.

Most tools tell you what's unused. scant also tells you what's barely used. Think of those dependencies pulled in for one function, called on a couple of lines, that might be stopping you from your next Python upgrade (true story).

Built for plain English: flags are spelled out in full (--threshold-lines, not -L), and every result or error reads in words a non-developer can follow. The idea is to continue making the CLI very nice to look at. Like candy for your eyes.

Written in rust ⚡️

Install

pipx install scant

Usage

scant .
scant . --threshold-lines 5
scant . --env path/to/venv
scant . --env path/to/venv/bin/python

scant needs to read your dependencies' installed metadata to map a declared name to what you actually import (e.g. PyYAML -> yaml) -- there's no reliable way to do that without them being installed somewhere. It looks, in order, at: --env if you passed it, $VIRTUAL_ENV, $CONDA_PREFIX, then any pyvenv.cfg-marked folder under the scanned path (so .venv, venv, env, venv311, etc. are all found automatically -- no need to name it right). --env also accepts a direct interpreter path, not just a directory (--env .venv/bin/python), which is handy inside containers or CI images that install packages straight into a system Python.

If none of that resolves -- or more than one folder looks like a venv -- scant explains what it checked and how to point it at the right one, rather than guessing:

$ scant .
Couldn't find a Python environment for this project.

scant needs to read your dependencies' installed metadata to map declared
names to imports (e.g. "PyYAML" -> "yaml") -- there's no reliable way to
do that without them actually being installed somewhere.

Checked:
  ├── $VIRTUAL_ENV   not set
  ├── $CONDA_PREFIX  not set
  └── ./   no .venv, venv, or other pyvenv.cfg-marked folder

To fix this:
  1. Activate a virtualenv with your dependencies installed, then re-run scant
  2. Or point at one directly:    scant . --env path/to/venv
  3. Or point at an interpreter:  scant . --env path/to/venv/bin/python

Example output

mkdocs -- 15 packages declared, 65 files read, 0.4s
Plan: drop 3, inline 4, keep 8.

  ACTION  PACKAGE             USES  LINES  USE       WHERE
  drop    colorama               0      0  none      --

  inline  markupsafe             1      1  trivial   mkdocs/utils/templates.py:55
  inline  pyyaml_env_tag         1      1  trivial   mkdocs/utils/yaml.py:120

  keep    click                  4     41  heavy     mkdocs/__main__.py +3 files
  keep    watchdog               2      2  light     mkdocs/livereload/__init__.py

License

MIT

Key dates

PyPI data
Data sourced directly from PyPI's database.
  • Released:
Newer release available (0.0.1)

1 maintainer

PyPI data
Data sourced directly from PyPI's database.
Avatar for alan707 from gravatar.com alan707

License expression

MIT
View SPDX License List

Requires

Python >=3.9

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