How can I check for unused import in many Python files?
Solution 1:
PyFlakes (similar to Lint) will give you this information.
pyflakes python_archive.py
Example output:
python_archive.py:1: 'python_archive2.SomeClass' imported but unused
Solution 2:
Use a tool like pylint which will signal these code defects (among a lot of others).
Doing these kinds of 'pre-runtime' checks is hard in a language with dynamic typing, but pylint does a terrific job at catching these typos / leftovers from refactoring etc ...
Solution 3:
You can also consider vulture as one of several options.
Installation
pip install vulture # from PyPI
Usage
vulture myscript.py
For all python files under your project.
find . -name "*.py" | xargs vulture | grep "unused import"
Example
Applies to the code below.
import numpy as np
import pandas as pd
df = pd.DataFrame({'A': [1, 2], 'B': [3, 4]})
The results are as follows.
➜ vulture myscript.py
myscript.py:1: unused import 'np' (90% confidence)
myscript.py:4: unused variable 'df' (60% confidence)
Solution 4:
Have a look at PyChecker. It is a debugging tool and able to find unused variables and modules.
Solution 5:
I have been using pyflakes successfully and wished to auto-remove the unused imports.
I recently found autoflake:
- Uses pyflakes for checking.
- Defaults to removing unused standard library imports and redundant
passstatements. - Has options for removing other unused imports and unused variables.