Tuples

Tuples

A tuple is an ordered, immutable sequence written in round brackets: t = (10, 20, 30). A tuple with one element needs a trailing comma, (5,), because (5) is just the number 5.

Indexing, slicing, concatenation, repetition, membership, len(), min(), max(), sum(), sorted(), count() and index() all work as for lists. Methods that would change the tuple, such as append, do not exist, and t[0] = 1 raises a TypeError.

student = ("Asha", 17, "XI-A")
name, age, section = student       # tuple unpacking
print(name, section)               # Asha XI-A
point = (3, 4), (6, 8)             # a nested tuple
print(point[1][0])                 # 6
t = tuple([1, 2, 3])               # list to tuple

Use a tuple for a record that should not change, such as a date or a (latitude, longitude) pair. A function can return several values as a tuple: return lo, hi.

n = int(input())
records = []
for _ in range(n):
    name, marks = input().split()
    records.append((name, int(marks)))
best = records[0]
# find the record with the highest marks
print(best[0], best[1])