1.元组

• 元组一般用来存储多个数据，使用()

2.创建元组

• 创建空元组

tup1 = ()
print(tup1)    # ()
print(type(tup1))    # <class 'tuple'>

• 创建非空元组（元组中只有一个元素，一般要在元素的后面加 , 若不加 , 该数据类型不一定是元组，取决于元素的数据类型）

tup2 = (12)
print(type(tup2))    # <class 'int'>
tup3 = ("hello")
print(type(tup3))    # <class 'str'>
tup4 = (34,)
print(type(tup4))    # <class 'tuple'>

• 元组中的元素可以是不同的数据类型

tup5 = (132, 4.45, "hello", True, False, 87)
print(tup5)          # (132, 4, 45, 'hello', True, False, 87)
print(type(tup5))    # <class 'tuple'>

3.元组元素的访问

• 通过下标访问，0下标表示第一个元素，-1表示最后一个元素

tup5 = (132, 4.45, "hello", True, False, 87)
print(tup5[0])     # 132
print(tup5[-1])    # 87
print(tup5[4])     # False

4.元组中的元素不能修改

tup5 = (132, 4.45, "hello", True, False, 87)
tup5[1] = 99    # TypeError: 'tuple' object does not support item assignment
print(tup5)

5.删除元组 del

tup5 = (132, 4.45, "hello", True, False, 87)
del tup5
print(tup5)     # NameError: name 'tup5' is not defined. Did you mean: 'tup1'?