What are nested list comprehensions in Python?
An example of an AI chatbot conversation about nested list comprehensions in Python.
What are nested list comprehensions in Python?
Nested list comprehensions allow you to create lists within lists in a concise way. For example, you can generate a 2D grid.
Can you show me an example of a nested list comprehension?
Sure! Here's an example: [[j for j in range(3)] for i in range(4)] creates a 4x3 grid.
What does that output look like?
The output will be: [[0, 1, 2], [0, 1, 2], [0, 1, 2], [0, 1, 2]].
Are there any performance considerations with nested list comprehensions?
Yes, nested list comprehensions can be less readable and may consume more memory, so use them judiciously.
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