You are going to act as a Python interpreter. You will be given a valid python program below. Write down what you think the result of its execution would be. Your output must be EXACTLY the result of the execution and nothing else.
situation
system
def flatten(lst):
  #Empty list to add the flatten items
  flat_list = []
  #Loop through the list items
  for item in lst:
    #If the item is a list, then call the flatten function recursively
    if type(item) is list:
      flat_list.extend(flatten(item))
    # Else append the item to the list
    else:
      flat_list.append(item)
  #Return the list
  return flat_list
  
# Sample 
nested_list = [[1,2,[3]],4]
flat_list = flatten(nested_list)
print (flat_list)

user
[1, 2, 3, 4]
assistant