find the largest size in a list - python

# Python program to find largest 
# number in a list 
  
# creating empty list 
list1 = [] 
  
# asking number of elements to put in list 
num = int(input("Enter number of elements in list: ")) 
  
# iterating till num to append elements in list 
for i in range(1, num + 1): 
    ele = int(input("Enter elements: ")) 
    list1.append(ele) 
      
# print maximum element 
print("Largest element is:", max(list1)) 

longest_string = len(max(a_list, key=len))