Question

Language: Python

Topic: Lists

Function name : flatten_list
Parameters : aList (list)
Returns: final_list (list)
Description : Write a function that takes in a list and returns a new list. If any elements of the list are also lists, the returned list should have the individual elements of that nested list. If there no elements in the original list, return an empty list. You can assume that the nested lists will not contain any elements that are also nested lists. The elements of the returned list should be in the same order of the original list. Hint: using the built-in type() will be useful.

Test Cases:

>>> list1 = flatten_list([True,"or",["Dare",88.8,False],"2",[3,5]]) >>> print(list1)
[True, 'or', 'Dare', 88.8, False, '2', 3, 5]

>>> list2 = flatten_list(["CS",[1301.0,False,True],[100,0.0],"GTENS"]) >>> print(list2)
['CS', 1301.0, False, True, 100, 0.0, 'GTENS']

Answer 1

nestedlist.py:

from collections import Iterable

def flatten_list(list):
for item in list: #items in list
if isinstance(item, Iterable) and not isinstance(item, (str, bytes)):
for sub_item in flatten_list(item): #sub items in sub list
yield sub_item
else:
yield item
#example list-1
list1 = [True,"or",["Dare",88.8,False],"2",[3,5]]
#printing list-1
print(list(flatten_list(list1)))
#example list-2
list2 =["CS",[1301.0,False,True],[100,0.0],"GTENS"]
#printing list-2
print(list(flatten_list(list2)))

Output Screenshots: