What are nested comprehensions in Python?
An example of an AI chatbot conversation about nested comprehensions in Python.
What are nested comprehensions in Python?
Nested comprehensions are a way to create lists (or other collections) using multiple loops in a single line of code.
Can you give me an example of a nested list comprehension?
Sure! Here's an example: [[x*y for y in range(3)] for x in range(3)] creates a 3x3 multiplication table.
How does this work step by step?
First, the outer loop iterates over x, and for each x, the inner loop iterates over y, multiplying them together.
What if I want to filter the results?
You can add an if condition at the end, like this: [[x*y for y in range(3) if y > 0] for x in range(3)].
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