How do I make a flattened list out of a list of lists?

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#1

How do I make a flattened list out of a list of lists?

#2

Hello Sakshi,

Using List Comprehension: One common way to flatten a list of lists is to use list comprehension. List comprehension allows you to iterate over each element in the nested lists and flatten them into a single list.

nested_list = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]
flattened_list = [item for sublist in nested_list for item in sublist]
print(flattened_list)

This will output: [1, 2, 3, 4, 5, 6, 7, 8, 9]

#3

Hello Sakshi,

Using Nested Loops: You can also flatten a list of lists using nested loops. This method is more explicit but achieves the same result.

nested_list = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]
flattened_list = []
for sublist in nested_list:
    for item in sublist:
        flattened_list.append(item)
print(flattened_list)

This will also output: [1, 2, 3, 4, 5, 6, 7, 8, 9]