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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

Find all indexes of a substring

Write a function that returns a list of all starting indexes where a substring appears in a string, including overlapping occurrences.

substring string searching

Strings & Text easy

Safe Command Executor

Implement emulate_run that simulates running a command list and returns output and exit code.

string-parsing simulation lists

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

Parse numbered list

Take a string containing a numbered list and return a clean list of the item texts.

string parsing strip split

Strings & Text easy

Parse coordinate pairs

Parse a string of coordinate pairs into a list of coordinate lists.

parsing strings split

Strings & Text easy

Parse range notation

Parse a comma-separated list of ranges and individual numbers, expanding each range into its full sequence.

strings parsing ranges

Strings & Text easy

Find repeated words

Return a lowercase list of unique words that appear more than once across a given text, ignoring case.

string parsing word-count

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

Strings & Text easy

Parse Hex Dump

Write a function that parses a hex dump string into a list of integers.

hex parsing bytes

Showing 1–9 of 9 challenges · easy · 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.