PYTHON

python flatten list

l = [[1, 2], [3, 4], [5, 6, 7]]
flat_list = [item for sublist in l for item in sublist]
# flat_list = [1, 2, 3, 4, 5, 6, 7]

python flatten list

my_list = [[1], [2, 3], [4, 5, 6, 7]]

flat_list = sum(my_list, [])
print(flat_list)

python list flatten

nested_lists = [[1, 2], [[3, 4], [5, 6], [[7, 8], [9, 10], [[11, [12, 13]]]]]]
flatten = lambda x: [y for l in x for y in flatten(l)] if type(x) is list else [x]
flatten(nested_lists)
# [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13]

python flatten list

my_list = [[1], [2, 3], [4, 5, 6, 7]]

flat_list = [num for sublist in my_list for num in sublist]
print(flat_list)

python flatten list

itertools.chain.from_iterable(factors)

flatten list python

def flatten(L):
    for item in L:
        try:
            yield from flatten(item)
        except TypeError:
            yield item

list(flatten([[[1, 2, 3], [4, 5]], 6]))
>>>[1, 2, 3, 4, 5, 6]

flatten a list

# flatten a list
flst = [[1,2,3], [8,9,12,17],[3,7]]
flatten_list = sorted(sum(flst,[]))
print(flatten_list)					# [1, 2, 3, 3, 7, 8, 9, 12, 17]

flatten list

regular_list = [[1, 2, 3, 4], [5, 6, 7], [8, 9]]
flat_list = [item for sublist in regular_list for item in sublist]
print('Original list', regular_list)
print('Transformed list', flat_list)

flatten list in python

regular_list = [[1, 2, 3, 4], [5, 6, 7], [8, 9]]
flat_list = [item for sublist in regular_list for item in sublist]
print('Original list', regular_list)
print('Transformed list', flat_list)

python flatten list

from functools import reduce

my_list = [[1], [2, 3], [4, 5, 6, 7]]
print(reduce(lambda x, y: x+y, my_list))

python flatten list

my_list = [[1], [2, 3], [4, 5, 6, 7]]

flat_list = []
for sublist in my_list:
    for num in sublist:
        flat_list.append(num)

print(flat_list)

flatten list python

from typing import Iterable

# flatten any number of nested iterables (lists, tuples)
def flatten_iterables(iterable: Iterable) -> list:
    """Convert iterables (lists, tuples) to list (excluding string and dictionary)

    Args:
        iterables (Iterable): Iterables to flatten

    Returns:
        list: return a flattened list
    """
    lis = []
    for i in iterable:
        if isinstance(i, Iterable) and not isinstance(i, str):
            lis.extend(flatten_iterables(i))
        else:
            lis.append(i)
    return lis

python flatten list

import itertools

my_list = [[1], [2, 3], [4, 5, 6, 7]]

flat_list = list(itertools.chain(*my_list))
print(flat_list)