Python Coding Challenges

Custom iterator class

Implement a custom iterator class that repeatedly yields elements from a list up to a given number of times.

iterator class cycle

generators yield sliding-window

Window Iterator

Implement a generator that yields consecutive windows of a given size from any iterable.

generators iterators pairs

Pairwise Sequence Pairs

Write a generator function pairwise that yields each consecutive overlapping pair from any iterable as lists.

generator groupby consecutive

Groupby Consecutive

Write a generator function that yields (value, list_of_occurrences) for each run of consecutive equal items.

iterator generator flatten

Flatten Nested List Iterator

Implement a class that iterates over all integers in a nested list structure in depth-first order.

iterator-protocol class lazy-evaluation

Iterator protocol class

Implement a class that follows the iterator protocol and yields squared numbers up to a given limit.

+10 pts 10m

generators iterators chunking

Batch Iterator

Implement a generator that yields batches of a given size from any iterable, including the final partial batch.

Zip Longest Fill

Create an iterator that yields lists from multiple iterables, padding with a fill value when lengths differ.

generators zip iteration

Graph DFS Generator

Implement a generator function that performs a depth-first traversal of a graph without recursion.

generators dfs graph