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How to rename music files by ID3 tags in Python

Renames MP3 files in a folder using artist and title extracted from ID3 tags, with a mock fallback that parses filenames.

file-renaming id3-tags mp3

Python

import os
import re
from pathlib import Path

def sanitize_filename(name: str) -> str:
    return re.sub(r'[<>:"/\\|?*]', '_', name).strip()

def rename_mp3_from_id3(path: Path) -> None:
    for f in path.glob("*.mp3"):
        # Mock ID3 extraction: derive artist/title from filename
        stem = f.stem
        if "…

12 0 Open

Automation & scripting easy

Parse WHOIS Data with Python Regex

Extract domain registration fields from a mock WHOIS record using regex and compute days until expiration.

whois regex parsing

Python

import re
from datetime import datetime


def parse_whois(whois_text: str) -> dict:
    """Extract key registration fields from a mock WHOIS record."""
    patterns = {
        "domain": r"Domain Name:\s*(.+)",
        "registrar": r"Registrar:\s*(.+)",
        "creation_date": r"Creation Date:\s*(.+)",
        "expir…

12 0 Open

Automation & scripting easy

Parse nginx access log top IPs in Python

Reads an nginx access log line by line, extracts the client IP, and returns the most frequent IPs using a regex and Counter.

nginx log parsing regex

Python

import re
from collections import Counter

def top_ips(log_file, n=10):
    ip_pattern = re.compile(r'^(\S+)')
    ip_counts = Counter()

    with open(log_file, 'r') as f:
        for line in f:
            match = ip_pattern.match(line)
            if match:
                ip_counts[match.group(1)] += 1

    return…

14 0 Open

Automation & scripting easy

Run pytest and email summary in Python

Runs pytest via subprocess, extracts the test summary line, and sends it in an email (mocked for demonstration).

pytest subprocess email

Python

import smtplib
import subprocess
from email.mime.text import MIMEText
from email.mime.multipart import MIMEMultipart


def run_tests():
    """Run pytest and capture the summary output."""
    result = subprocess.run(
        ["pytest", "-q"],
        capture_output=True,
        text=True
    )
    return result.stdo…

13 0 Open

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