decompyle3

Spec sheet

Purpose

decompyle3 translates Python bytecode back into equivalent Python source code.Read 5 Oct 2026 · github.com

Support

The bug reporting guidance says fixes may take months or years and that the maintainer does not provide paid support as a regular service.Read 5 Oct 2026 · github.com

License

The GitHub repository identifies its license as GPL-3.0.Read 5 Oct 2026 · github.com

Accuracy limits

The README cautions that decompilation has numerous bugs and that some long lists of expressions or statements run slowly.Read 5 Oct 2026 · github.com

Bytecode versions

The README says it accepts Python bytecode from version 3.7 onward, and that bytecode from Python 3.7 and 3.8 has been tested.Read 5 Oct 2026 · github.com

Command line

The README shows running `decompyle3` on compiled `.pyc` or `.pyo` files and documents a `--syntax-verify` option.Read 5 Oct 2026 · github.com

Fragment decompiler

The project describes itself as a native Python cross-version decompiler and fragment decompiler.Read 5 Oct 2026 · github.com

Installation

The README documents installation from PyPI with `pip install decompyle3` or from source.Read 5 Oct 2026 · github.com

Issue confidentiality

The bug reporting guidance says issue reports and the code in them are public and have no confidentiality.Read 5 Oct 2026 · github.com

Restrictions

The README says the project does not handle obfuscated code, Cython, MicroPython, or Py2EXE executables directly.Read 5 Oct 2026 · github.com

Where Specifiction places it

• Reverse Engineering Tools#45 of 736.4
• Decompiler Software#23 of 246.5