TypeError: 'int' object is not callable

I’ll try to answer without an inbuilt max() function.

In the below program, I am using int_max in python. which will help to manually find the max value of the list.

Code:

#different number of elements inside each zeilen list 
Zeilen1 = [1, 2,3,45, 3,7,5,6,7,8] 
Zeilen2 = [7,8,9]
Zeilen3 = [6, 9,34,34,3,5,6,7,8,32,2] 
l1 = len(Zeilen1)
l2 = len(Zeilen2)
l3 = len(Zeilen3)
Laengen = [l1, l2, l3]
#to print the exact Zeilen name which has the max element 
Zeilen_names = ['Zeilen1', 'Zeilen2', 'Zeilen3']
int_max = -float('inf')
max_index = -1
for i, length in enumerate(Laengen):
 if length > int_max:
  int_max = length
  max_index = i 
print(f"The maximum length is: {int_max}")
print(f"This corresponds to: {Zeilen_names[max_index]}")

Output:

The maximum length is: 11
This corresponds to: Zeilen3