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Strings & text

Format, split, join, parse, and clean text — everyday Python string patterns.

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Build a Secure Password Strength Checker in Python

A Python function that evaluates password strength based on length and character diversity, returning Weak, Moderate, or Strong.

password security regex

Python

import re

def password_strength(password: str) -> str:
    score = 0
    if len(password) >= 8:
        score += 1
    if re.search(r'[a-z]', password):
        score += 1
    if re.search(r'[A-Z]', password):
        score += 1
    if re.search(r'\d', password):
        score += 1
    if re.search(r'[!@#$%^&*(),.?":…

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Strings & text — Python code examples

What you will find here

This page collects strings & text 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.

Free online Python IDE Write and run Python in your browser — no install. Free Python code formatter Format with autopep8 — side-by-side PEP 8 cleanup. Python code samples Copy-ready snippets to study and run in the IDE.

Build a Secure Password Strength Checker in Python

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Strings & text — Python code examples

What you will find here

Samples vs tutorials and challenges

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