How Can I Use Nested Loops on Pyhton

July 1, 2023

I saw an example about using nested loop in pyhton.

students = [['Igor', 'Sokolov'], ['Riko', 'Miyazaki'], ['Tuva', 'Johansen']]
for student in students:
   for name in student:
       print(name)
   print()

I want to use same thing below:

def id_validator(verified_ids,feedback_ids):
    for ids in id_validator:
        for x in ids:
            print(x)
    
    
    
id_validator([5, 8], [5,8,30,50])

I expected to see
5
8
5
8
30
50
but I got a Type Error:’function’ object is not iterable

>Solution :

Your problem is that you are using the same name id_validator for both the function and the loop variable! to fix this, you need to use a different variable name for the loop!

so check this out:

def id_validator(verified_ids, feedback_ids):
    for ids in [verified_ids, feedback_ids]:
        for x in ids:
            print(x)

id_validator([5, 8], [5, 8, 30, 50])

output will be 5 8 5 8 30 50