Question

How to flatten a list of lists using for loop in Python

Answer 1

lst_lst = [[1,2,3],[4,5,6],[7,8],[9, 0]] 
lst = []

for i in range(len(lst_lst)): 
  for j in range (len(lst_lst[i])): 
    lst.append(lst_lst[i][j]) 
 
print(lst)
 
 
 
 
'''
run:
 
[1, 2, 3, 4, 5, 6, 7, 8, 9, 0]
 
'''

 

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