PYTHON

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 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

.flatten() python

>>> a = np.array([[1,2], [3,4]])
>>> a.flatten()
array([1, 2, 3, 4])
>>> a.flatten('F')
array([1, 3, 2, 4])