Longest word in a sentence
Write a function that returns the longest word from a sentence, with first-occurrence tie-breaking.
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.
Longest Word Finder
Write a function that extracts alphabetic words from a string and returns the longest one, with ties broken by earliest position.
Abbreviate Name
Create a function that takes a full name and returns an abbreviated version with initials and the last name.
Find substring index
Implement a function that returns the starting index of the first occurrence of a substring using only basic string indexing and slicing.
Sort characters in string
Write a function that sorts the characters in a string and returns the sorted string.
Safe Command Executor
Implement emulate_run that simulates running a command list and returns output and exit code.
Parse Log Line
Write a function that parses a log line and returns a dictionary with timestamp, level, and message.
Validate username format
Implement a function that validates a username according to length, allowed characters, and no consecutive underscores.
Showing 9 challenges · easy · Strings & Text
Strings & Text — Python coding challenges
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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.
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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.