How To Add Elements To A Sub List In Python?

Consider a list inside a list list1 = ['element1','element2',['subelement1','subelement2']] subelement1 can be accessed by index [2][0] print (list1[2][0]) But how can I insert e

Solution 1:

Try to insert element to sublist as below:

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

Solution 2:

I would like to extend the answer posted by @Andersson. It would be nice to checking the type of the list element, then insert a new value.

def list_modify(element_to_add):
  list1 = ["element1", "element2", ["subelement1", "subelement2"]]
  for index, value in enumerate(list1):
      if isinstance(value, list):
          list1[index].insert(0, element_to_add)
  print(list1)
  #  ['element1', 'element2', ['subelement0', 'subelement1', 'subelement2']]
if __name__ == "__main__":
  list_modify('subelement0')