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925 challenges 556 easy 323 medium 46 hard

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All Python Basics Strings & Text Lists & Arrays Dicts & Sets Functions & Closures OOP & Classes Data Structures & Algorithms Advanced Python Iterators & Generators Decorators & Context Managers Error Handling & Exceptions Regular Expressions Math & Number Theory Bit Manipulation Dynamic Programming Trees & Binary Trees Graphs & Graph Algorithms Recursion & Backtracking Greedy Algorithms Binary Search Two Pointers & Sliding Window Stacks & Queues Heaps & Priority Queues Linked Lists Matrix & 2D Arrays Datetime & Time Calculations Data Formats & Parsing SQL & SQLite Numpy & Vectorized Computing Cryptography & Hashing

Strings & Text easy

Is pangram

Write a function that determines whether a given string is a pangram, ignoring case and non-letter characters.

strings sets algorithm

Strings & Text easy

Is isogram

Implement a function that determines whether a string is an isogram (no repeated letters, case-insensitive).

strings case-insensitive validation

Strings & Text easy

Is rotation of another string

Write a function to determine if one string is a rotation of another string.

strings rotation membership

Strings & Text easy

Hamming Distance

Implement a function that computes the Hamming distance between two strings of equal length.

strings character-comparison distance

Strings & Text medium

Minimum Remove Valid Parentheses

Given a string with parentheses and letters, remove the fewest parentheses to make it valid.

strings stack validation

Strings & Text easy

Parse bullet list

Parse a markdown-style bullet list and return the list of item texts, stripping bullet markers and trimming surrounding whitespace.

parsing strings markdown

Strings & Text easy

User Friendly Message

Given a raw user input, format it into a single clean sentence with proper sentence case and trimming.

strings formatting cleaning

Strings & Text easy

Crawler Log Folder

Given a list of folder navigation operations, compute the minimum steps required to return to the main folder.

strings stack simulation

Showing 1–8 of 8 challenges · Strings & Text

Strings & Text — Python coding challenges

What you will find here

This page lists strings & text challenges — real Python problems you solve in the browser IDE with instant test feedback. Each challenge includes a clear brief, starter code, and automated checks.

Challenges vs tutorials and quizzes

Challenges test what you can build under constraints. For guided teaching, use our Python tutorials. For quick checks, try quizzes or copy snippets from code samples.