How to flatten a list of lists in python?

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87

Anonymous

Asked: August 9, 20222022-08-09T07:49:44+00:00 2022-08-09T07:49:44+00:00Computer programming

How to flatten a list of lists in python?

Hi,

I want to convert a list using python.

I have a list of list like this:

original_List=[['a', 'b', 'c', 'd','e'], ['f', 'g', 'h', 'i'], ['j', 'k', 'l'], ['m', 'n', 'o']]

1 2	original_List=[['a', 'b', 'c', 'd','e'], ['f', 'g', 'h', 'i'], ['j', 'k', 'l'], ['m', 'n', 'o']]

I want to converti into this:

flat_List=['a', 'b', 'c', 'd','e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o']

1 2	flat_List=['a', 'b', 'c', 'd','e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o']

Thanks

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Anonymous · Answer 1 · 2022-08-09T09:02:03+00:00

Hello

this code may help you:

def flatten_list(original_List):
    flat_list = []
    for sub_list in original_List:
        for element in sub_list:
            flat_list.append(element)
    return flat_list

#test
original_List=[['a', 'b', 'c', 'd','e'], ['f', 'g', 'h', 'i'], ['j', 'k', 'l'], ['m', 'n', 'o']]
print('original list = ', original_List)
print('flat list = ', flatten_list(original_List))

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def flatten_list(original_List):

flat_list = []

for sub_list in original_List:

for element in sub_list:

flat_list.append(element)

return flat_list

#test

original_List=[['a', 'b', 'c', 'd','e'], ['f', 'g', 'h', 'i'], ['j', 'k', 'l'], ['m', 'n', 'o']]

print('original list = ', original_List)

print('flat list = ', flatten_list(original_List))

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