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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

Pin Python package versions in requirements.txt

Pin package versions in requirements.txt-style text by adding ==version when no specifier is present, while preserving existing version constraints and comments.

requirements automation versions

Python

import re
from pathlib import Path


def pin_versions(requirements_text: str) -> str:
    """
    Pin package versions in requirements.txt-style text.
    Adds ==version if no version specifier is present.
    Keeps existing specifiers (>=, <=, ~=, etc.) unchanged.
    """
    lines = requirements_text.strip().splitli…

14 0 Open

Automation & scripting easy

Post a message to a Slack webhook in Python

Send a message to a Slack webhook endpoint using the standard library's urllib.request, handling the POST request and response cleanly.

slack webhook urllib

Python

import json
from urllib import request

def post_to_slack(webhook_url: str, message: str) -> dict:
    payload = json.dumps({"text": message}).encode("utf-8")
    req = request.Request(
        webhook_url,
        data=payload,
        headers={"Content-Type": "application/json"},
        method="POST",
    )
    wit…

11 0 Open

Automation & scripting easy

Rename Files in Folder with Numeric Prefix in Python

Renames all files in a folder by adding a sequential numeric prefix (e.g., 01_, 02_) to each filename using pathlib.

file-renaming pathlib automation

Python

from pathlib import Path

def rename_with_numeric_prefix(folder_path):
    folder = Path(folder_path)
    for index, file_path in enumerate(folder.iterdir(), start=1):
        if file_path.is_file():
            new_name = f"{index:02d}_{file_path.name}"
            new_path = file_path.with_name(new_name)
           …

13 0 Open

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