Git + Python
Automate Git from Python — diffs, hooks, release tags, and repo housekeeping.
Amend Last Commit Message in Python
This script uses subprocess to run `git commit --amend` and update the most recent commit's message in your repository.
import subprocess
import sys
def amend_last_commit_message(new_message: str) -> None:
"""Change the message of the most recent commit."""
result = subprocess.run(
["git", "commit", "--amend", "-m", new_message],
capture_output=True,
text=True,
check=False,
)
if result.…Find the Commit That Introduced a String in Git History Using Python
Use git log -S with Python subprocess to find the earliest commit that introduced a specific string across your repository history.
import subprocess
import sys
def find_introducing_commit(repo_path: str, search_string: str, file_glob: str = "*") -> str:
"""Find the first commit that introduced a given string in a git repository."""
result = subprocess.run(
["git", "-C", repo_path, "log", "--all", "--oneline", "-S", search_string…How to Archive a Repository as a ZIP in Python
Create a ZIP archive of a repository directory with a mock export, skipping hidden files and __pycache__ folders.
import zipfile
import io
import os
from pathlib import Path
def archive_repo_mock(repo_path, output_path="repo_archive.zip"):
"""Create a zip archive of a repository directory (mock export)."""
repo = Path(repo_path)
if not repo.exists():
raise FileNotFoundError(f"Repository not found: {repo}")
…How to Filter Git History to Remove Secret File Entries in Python
A pure-Python mock that filters a repository's history to drop any commit that touched a secret file, so you can plan a cleanup before rewriting Git history.
from pathlib import Path
import json
def filter_history(history, secret_path):
"""Remove entries that touch the secret file."""
return [entry for entry in history if secret_path not in entry["files"]]
if __name__ == "__main__":
repo_history = [
{"commit": "a1b2c3", "message": "Add app", "files": …How to Mirror a Bare Git Repository Backup in Python
Run a git clone --bare subprocess to create a timestamped bare-repo backup folder with error handling.
import subprocess
import shlex
from pathlib import Path
from datetime import datetime
def mirror_bare_repo(source_url: str, backup_dir: str) -> str:
"""Mirror a bare git repository to a timestamped backup folder."""
backup_path = Path(backup_dir)
backup_path.mkdir(parents=True, exist_ok=True)
timest…How to Mock Git Cherry-Pick in Python for Tests
Mock the `repo.git.cherry_pick` method with `unittest.mock` to test a Git cherry-pick helper without a real repository.
from unittest.mock import patch, MagicMock
class GitCherryPicker:
def __init__(self):
self.applied_commits = []
def cherry_pick(self, commit_hash, repo):
try:
result = repo.git.cherry_pick(commit_hash)
self.applied_commits.append(commit_hash)
return f"A…How to Mock Git Stash and Pop in Python
Mock Git stash, apply, and pop operations using unittest.mock so you can test Git automation without touching a real repository.
import git
from unittest.mock import Mock, patch
def stash_and_pop(repo):
"""Mock a stash operation and then pop it back."""
repo.git.stash("save", "WIP: temp changes")
stashed_output = repo.git.stash("list")
# Simulate the stash was applied, then pop
repo.git.stash("apply", "stash@{0}")
…How to Push Git Tags to a Remote with Python
Push specified git tags (or all tags) to a remote repository using Python's subprocess module with error handling.
import subprocess
import sys
def push_tags_to_remote(remote: str = "origin", tags: list[str] | None = None) -> None:
"""
Push git tags to a remote repository.
If no tags are given, push all local tags.
"""
if tags:
subprocess.run(["git", "push", remote, *tags], check=True)
else:
…How to Revert a Commit and Create a New Revert Commit in Python
Demonstrates a mock Git repository that creates a new revert commit on top of the current head when reverting an existing commit.
class GitCommit:
"""Minimal mock of a git commit for demonstrating revert behavior."""
def __init__(self, sha, message):
self.sha = sha
self.message = message
self.parent = None
class GitRepository:
"""Mock repository tracking a simple commit chain."""
def __init__(self):
…How to sync a fork with upstream in Python
Run git fetch and merge commands from Python with subprocess to sync a forked repository with upstream/main.
import subprocess
import sys
def sync_fork_with_upstream():
"""Simulate syncing a forked repo with upstream via git commands."""
# Mock git operations: pretend to fetch from upstream and merge into main
fetch_result = subprocess.run(
["git", "fetch", "upstream"],
capture_output=True, tex…Browse by section
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Git + Python — Python code examples
What you will find here
This page collects git + python snippets — short, copy-ready Python you can paste into our free online IDE and run without installing anything. Each sample includes a plain-English explanation and the full source code.
Samples vs tutorials and challenges
Samples are quick reference — one concept per page. For step-by-step teaching, use our Python tutorials. To test yourself, try quizzes or coding challenges. Clean up style with the Python formatter.