decompyle3

library3.9.3pypypi✓ verified 85d ago

Python cross-version byte-code decompiler targeting Python 3.7-3.8 bytecode. Current version is 3.9.3 (2025). Releases are sporadic, roughly once per year. Requires xdis (6.x) and spark-parser. Supports running on CPython up to 3.13 but only decompiles bytecode up to 3.8.

serialization data

pip install decompyle3

github ↗package ↗

INSTALL

IMPORT

SIG · DECOMPYLE3

decompyle3

serializationpythonv3.9.3

Install

2.5s avg

Import

—

Disk

21MB

Pass rate

10/ 10

Env Coverage10 / 10

glibc

3.9–3.13

musl

3.9–3.13

Install & Compatibility

Where this runs

tested against v3.9.3 · pip install

no network on importno background threads

Install × environment matrix

Each cell = how many times install + import succeeded across repeated harness runs. Partial = flaky.
glibc = Debian/Ubuntu slim · musl = Alpine Linux

musl

py 3.10–3.95 runs

installs and imports cleanly · install 0.0s · import 0.000s · 22.8MB

glibc

py 3.10–3.95 runs

installs and imports cleanly · install 2.5s · import 0.000s · 23MB

21MB installed

● package 21MB

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

decompile_file

✓ from decompyle3 import decompile_file

✗ from decompyle3 import decompile

Decompile a .pyc file to stdout. Requires Python 3.7-3.8 bytecode.

from decompyle3 import decompile_file import sys # Decompile a .pyc file and print source out = sys.stdout with open('example.pyc', 'rb') as fp: decompile_file(out, fp)

decompyle3 --version

Debug

Known issues

breakingdecompyle3 only decompiles Python 3.7 and 3.8 bytecode. It cannot decompile bytecode from Python 3.9+.

fix

Use uncompyle6 for Python 2.7-3.8, or try pycdc/decompyle3-fork for newer bytecode.

affects: all

gotchaThe package requires xdis version 6.x, which may conflict with other tools that require xdis 5.x or 4.x.

fix

Use a virtual environment to isolate decompyle3 from other projects with different xdis requirements.

affects: >=3.8.0

gotchaCommand-line tool is `decompyle3`, not `decompyle`. Running `decompyle` will fail with 'command not found'.

fix

Install and run `decompyle3 filename.pyc`.

affects: all

deprecatedSupport for Python 2.x has been removed. Use uncompyle6 for Python 2.7.

fix

Install uncompyle6 for Python 2 decompilation.

affects: >=3.0

Upgrade

Version history

3.9.3latest on PyPI · released Oct 1, 2025

Audit

Dependencies

xdisrequiredRequired for bytecode disassembly and interpretation

spark-parserrequiredRequired for parsing decompiled tokens

Agent activity

18 hits · last 30 days

node

OpenAI (training)

Resources

githubhttps://github.com/rocky/python-decompile3 ↗

packagehttps://pypi.org/project/decompyle3/ ↗