Python的元组

aTuple=("java",77,88,99)
print(aTuple)
输出：
('java', 77, 88, 99)

访问元组

aTuple=("java",77,88,99)
print(aTuple)
print(aTuple[0])
print(aTuple[1])
print(aTuple[2])

修改元组

aTuple=("java",77,88,99)
print(aTuple)
aTuple[0]="Python"
print(aTuple)

 aTuple[0]="Python"
TypeError: 'tuple' object does not support item assignment

元组的内置函数count, index

 >>> a = ('a', 'b', 'c', 'a', 'b')
>>> a.index('a', 1, 3) # 注意是左闭右开区间 Traceback (most recent call last):
File "<stdin>", line 1, in <module> ValueError: tuple.index(x): x not in tuple >>> a.index('a', 1, 4)
3
>>> a.count('b')
2
>>> a.count('d')
0