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Comprehensions
Pythonic one-liners · 3 lessons
Write compact, readable transforms with list, filtering and dict comprehensions — the idiom that makes code look and feel like real Python.
Practice this track with instant, on-device checks in CodeCub.
Get the appLessons in this track
- 1List comprehensions
- 2Filtering comprehensions
- 3Dict comprehensions
How you'll be checked
Each lesson pairs a short explanation with 2–3 exercises, graded deterministically on your device:
🔮 Predict the output
Read a snippet and say exactly what it prints — the fastest way to build a mental model of how Python runs.
✏️ Fill the blank
Complete the missing token so the code does what the prompt asks. No syntax hand-holding.
🔢 Order the lines
Drag shuffled lines back into the sequence that produces the right result.
✅ Pick the answer
Choose the correct statement about behaviour, output or a concept.