In Python, What Is The Process Of Creating A Flat List From A List Of Lists?

You can use itertools.chain() or list comprehension to flatten a list of lists in Python. Here are two examples:

  1. Using itertools.chain():
import itertools

nested_list = [[1, 2, 3], [4, 5], [6, 7, 8, 9]]
flattened_list = list(itertools.chain(*nested_list))

print(flattened_list)

Output:

[1, 2, 3, 4, 5, 6, 7, 8, 9]
  1. Using list comprehension:
nested_list = [[1, 2, 3], [4, 5], [6, 7, 8, 9]]
flattened_list = [i for sublist in nested_list for i in sublist]

print(flattened_list)

Output:

[1, 2, 3, 4, 5, 6, 7, 8, 9]

Both methods will give you a flattened list [1, 2, 3, 4, 5, 6, 7, 8, 9] as the output.

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