Write a Python program to calculate the maximum aggregate from the list of tuples (pairs)

from collections import defaultdict
def max_aggregate(st_data):
    temp = defaultdict(int)
    for name, marks in st_data:
        temp[name] += marks
    return max(temp.items(), key=lambda x: x[1])


students = [('Juan Whelan',90),('Sabah Colley',88),('Peter Nichols',7),('Juan Whelan',122),('Sabah Colley',84)]
print("Original list:")
print(students)
print("\nMaximum aggregate value of the said list of tuple pair:")
print(max_aggregate(students))