BeginnerCoder
Donate
Lesson 21 — Nested comprehensions
Comprehensions inside comprehensions
You can nest loops in one comprehension to flatten or build grids: the for clauses are written in the same order as nested loops.
Why it matters: it expresses matrix work compactly.
Flatten the 2D grid into one list with a comprehension and print it.
Run your code — when the output matches the task, you will see a green check. Then mark the lesson complete.
Test your knowledgeA quick 3-question quiz on this lesson — instant feedback.
Ready for more? Optional paid resources that pick up where this lesson leaves off.
Some links on this page are affiliate links: we may earn a commission at no extra cost to you. As an Amazon Associate I earn from qualifying purchases.
Project-based Python Foundations courses if you want a structured paid path after the free lessons. Wait for a sale — prices drop often.
Browse on Udemy →Search Amazon for Python Foundations books — check the publication year so the examples match current versions.
Search Amazon →