Python Coding Challenges

url-parsing strings parsing

Parse URL components

Write parse_url that splits a URL into its standard components with defaults for missing parts.

Parse HTTP Status Line

Write a function that parses a well-formed HTTP status line into its three components.

strings parsing http

+8 pts 15m

Parse markdown headers

Write a function that parses markdown headers and returns their levels and texts.

markdown parsing strings

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

string parsing strip split

Parse numbered list

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

Parse Version SemVer

Write a function that parses a semantic version string into its numeric components.

strings parsing semver

strings parsing comparison

Compare Version Strings

Given two version strings, compare them numerically by splitting on dots and ignoring leading zeros.

Parse path segments

Implement a function that parses a path string into clean segments, ignoring slashes, empty parts, and dot segments.

strings parsing split

Parse coordinate pairs

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

parsing strings split

Parse range notation

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

strings parsing ranges

Parse Boolean Strings

Implement a function that parses a boolean string into a Python bool, handling True/False/Yes/No/1/0 case-insensitively.

strings boolean parsing

string parsing word-count

Find repeated words

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

Crawler Log Folder

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

strings stack simulation

Parse Hex Dump

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

hex parsing bytes

Dicts & Sets easy

Nested get with dotted path

Implement a function that safely retrieves a value from a deeply nested dictionary using a dot-separated path, returning a default if any key is missing.

dicts nested parsing

exceptions parsing default-value

Safe Integer from String

Implement safe_int that converts a string to an integer, returning a default value on any failure, with support for an optional base.

exceptions parsing validation

Safe int parser

Implement safe_parse_int that converts a string to an int, returning a default value on failure.

Safe Float Parser

Write a function that safely converts a string to a float, returning None for invalid inputs.

float exception parsing

parsing exceptions error-handling

Parse Error Recovery

Parse a whitespace-separated string into a list of valid integers, skipping invalid tokens.

regex lazy quantifier string parsing

Regular Expressions easy

Non-greedy quantifier

Implement a function that uses a non-greedy regex to extract the shortest substring between two delimiters.

regex named-groups parsing

Regular Expressions easy

Named group extraction

Parse a log line into structured fields using named groups and re.match.

Stacks & Queues easy

Balanced brackets in string

Check if a string of brackets is properly balanced using a stack-based approach.

stack string parsing

Datetime & Time Calculations easy

Format date output

Parse ISO date strings and format them into a friendly US-style date output.

datetime string-formatting date-parsing

Datetime & Time Calculations easy

Datetime to Unix timestamp

Parse a datetime string and convert it to a Unix timestamp assuming UTC.

datetime parsing timestamp