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First solution in Clear category for Flatten a List by azqueshu
def flat_list(a):
i = 0
while i < len(a):
if isinstance(a[i],list):
e = a.pop(i)
a = a[:i]+e+a[i:]
else:
i+=1
return a
if __name__ == '__main__':
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')
May 10, 2021
