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Python Coding
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467 challenges 330 easy 120 medium 17 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

Reverse a string

Return the characters of the string in reverse order.

strings slicing

Strings & Text medium

Zigzag string conversion

Encode a string in zigzag order across numRows rows, then read row by row.

Strings & Text easy

Extract Digits Only

Given a string that may contain letters, symbols, and whitespace, extract all digits in order and return them as an integer.

strings digits parsing

Strings & Text easy

Reverse Words in a Sentence

Reverse the order of words in a sentence while preserving single spaces between words.

strings split reverse

Strings & Text easy

Extract digits from string

Write a function that extracts all digit characters from a given string, preserving their original order.

strings digits parsing

Strings & Text easy

Extract Hashtags

Extract unique hashtags from a given text string in the order they appear.

strings parsing hashtags

Showing 6 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.