How to add elements to a sub list in Python?

Question

Consider a list inside a list

list1 = [\"element1\",\"element2\",[\"subelement1\",\"subelement2\"]]

subelement1 can be accessed by index [2][0]

Answer 1

Try to insert element to sublist as below:

list1[2].insert(0, 'subelement0') 
print(list1)
#  ['element1', 'element2', ['subelement0', 'subelement1', 'subelement2']]