# pyrefact Automatic python refactoring, with the goal of simplifying complicated code, deleting dead code, and to some extent improve performance.
It is strongly recommended that you version control or otherwise backup any code you run pyrefact on.
## Features
Run black and isort with –line-length=100.
Delete unused imports
Move safe imports to toplevel
Add missing imports by guessing what you probably wanted. * For example, if Sequence is used but never defined, it will insert from typing import Sequence at the top of the file.
Rename variables, functions and classes with conventions.
Delete unused functions, classes and variables.
Remove most pointless simple statements.
Remove branches of code that obviously do nothing useful.
Remove unreachable code.
Replace hardcoded inlined collections and comprehensions with set or generator equivalents in places where that would improve performance.
Remove redundant chained calls involving sorted(), set(), tuple(), reversed() and list().
Replace sorted()[:n] with heapq.nsmallest, replace sorted()[0] with min
Rename unused variables to _
Delete variables named _, unless where that would cause a syntax error.
Move code into primitive functions.
Remove duplicate function definitions.
Remove redundant elif and else.
Use is for comparisons to None, True and False instead of ==.
Remove unused self and cls function arguments, and add @staticmethod or @classmethod.
Move functions decorated with @staticmethod outside of their class namespaces.
More to come!
## Usage
`bash pip install pyrefact python -m pyrefact /path/to/filename.py --preserve /path/to/module/where/filename/is/used `
## Prerequisites
Many features require python>=3.9 to work, and pyrefact is not tested with earlier python versions. Some effort is made for it not to crash on 3.8, but most of the cool stuff is disabled.
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