how to access an element of nested list with a loop? like:
a = [20,[22,[3,[21],3], 30]]
#^^ i want to access this
how to access it with a loop, insead of using
a[1][1][1][1]
any solution on any language is accepted (preferably python)
Are you looking for something like:
def get_inner_most(a):
if not isinstance(a, list):
return a
elif len(a) == 0:
return None
elif len(a) == 1:
return a[0]
return get_inner_most(a[1])
You need to note that it will get you only the first inner most element found and I hope that is your requirement.
For example for the input [20,[22,[3,[21],3], 30], [9,[4,[5,[6]]]]] it will still return 21 but not 6. If that is your requirement i.e. the element at the largest depth then you need to update your question.
It's not via an explicit loop, but you can use the functoools.reduce() function as illustrated below:
from functools import reduce
def nested_getter(lst, *args):
return reduce(lambda s, i: s[i], args, lst)
a = [20,[22,[3,[21]]]]
print(nested_getter(a, 1, 1, 1, 0)) # -> 21
