Tuple

# Tuple 은 immutable
# immutable 이 필요한 곳에서는 list 대신에 tuple 을 사용하자

t = (1, 2, 3, 4, 1, 2)
print(type(t))  # <class 'tuple'>

# t[0] = 100  # TypeError: 'tuple' object does not support item assignment

print(t[0])  # 1
print(t[1:3])  # (2, 3)
print(t.count(1))  # 2

t = ([1, 2, 3], [4, 5, 6])
print(t[0][0])  # 1
t[0][0] = 100
print(t)  # ([100, 2, 3], [4, 5, 6])

####################################################################
num_tuple = (10, 20)
x, y = num_tuple
print(x, y)  # 10 20
x, y = (10, 20)
x, y = 10, 20  # 괄호 없이 사용해도 tuple 로 인식함

i = 100
j = 200
i, j = j, i
print(i, j)  # 200, 100


####################################################################
# unpack tuple
items = (0, 'b', 'one', 'zero')

a, *b, c = items
print(b)  # ['b', 'one']

*_, a, b = items
print(a)  # one