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Using recursive generator expression solution in Clear category for Flatten a List by WittyWalrus
def element_generator(lst):
for e in lst:
if isinstance(e, list):
for f in element_generator(e):
yield f
else:
yield e
def flat_list(array):
return [e for e in element_generator(array)]
if __name__ == '__main__':
assert flat_list([1, 2, 3]) == [1, 2, 3], "First"
assert flat_list([1, [2, 2, 2], 4]) == [1, 2, 2, 2, 4], "Second"
assert flat_list([[[2]], [4, [5, 6, [6], 6, 6, 6], 7]]) == [2, 4, 5, 6, 6, 6, 6, 6, 7], "Third"
assert flat_list([-1, [1, [-2], 1], -1]) == [-1, 1, -2, 1, -1], "Four"
print('Done! Check it')
July 10, 2019
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