Reference library

Automation & scripting

CLI tools, scheduled jobs, filesystem tasks, and glue scripts that save time.

5 matches

Batch Rename Hundreds of Files in Python

Rename all files with a given extension inside a folder using a sequential counter and a custom prefix.

import os
from pathlib import Path

def batch_rename_files(directory: str, prefix: str, extension: str = ".txt") -> None:
    """Rename all files with given extension in directory to prefix_{counter}.ext."""
    path = Path(directory)
    if not path.is_dir():
        print(f"Directory '{directory}' does not exist.")
…

57 0 Open

Automation & scripting easy

Convert Markdown to HTML in Python (Batch)

Convert every Markdown file in a directory to HTML with the Python markdown library, saving each result with an .html extension.

markdown html batch

Python

import markdown
from pathlib import Path


def convert_md_to_html(source_dir: str, dest_dir: str) -> list[str]:
    src = Path(source_dir)
    dst = Path(dest_dir)
    dst.mkdir(parents=True, exist_ok=True)

    converted_files = []
    for md_file in src.glob("*.md"):
        html_content = markdown.markdown(md_file.…

14 0 Open

Automation & scripting easy

Create ICS Calendar Invites in Python

This script generates a batch of calendar invites in the ICS format using the ics library.

ics calendar automation

Python

import ics
from datetime import datetime, timedelta

def create_invites(batch):
    calendar = ics.Calendar()
    for event_data in batch:
        event = ics.Event()
        event.name = event_data["name"]
        event.begin = event_data["start"]
        event.end = event_data["end"]
        event.description = even…

11 0 Open

Automation & scripting easy

How to Batch Resize Images in Python with pathlib and Pillow

Batch resize all JPG images from a source folder and save to a destination folder using pathlib and Pillow.

pathlib pillow image-processing

Python

from pathlib import Path
from PIL import Image

def batch_resize_images(src_dir: str, dest_dir: str, size: tuple[int, int] = (800, 600)) -> None:
    src_path = Path(src_dir)
    dest_path = Path(dest_dir)
    dest_path.mkdir(parents=True, exist_ok=True)
    
    for img_path in src_path.glob("*.jpg"):
        if not …

12 0 Open

Automation & scripting easy

How to Resize Hundreds of Images in Batch with Python

Resize every image in a folder to a target size using Pillow, creating a new subfolder for processed files.

image processing batch processing pillow

Python

import os
from PIL import Image

def resize_images_in_batch(directory, output_size=(800, 600)):
    if not os.path.exists(directory):
        print(f"Directory {directory} does not exist.")
        return
    output_dir = os.path.join(directory, "resized")
    os.makedirs(output_dir, exist_ok=True)
    for filename in…

41 0 Open

Browse by section

Each section groups closely related Python snippets.