本文共 936 字,大约阅读时间需要 3 分钟。
元组:
元组的可使用方法没有list 和str这么多:
1: tuple ---: 类方法,转换为元组类型
class tuple(object): """ tuple() -> empty tuple tuple(iterable) -> tupleinitialized from iterable's items If the argument is a tuple, thereturn value is the same object. """
2:count ----: 次数;记录值出现的次数
def count(self, value): # real signature unknown; restored from __doc__ """ T.count(value) -> integer -- return number of occurrences of value """ return 0
使用方法:
t = (11,22,33,44,55,22,44,22)print(type(t))print(t.count(22))### 输出结果3
3: index ----: 索引 ; 返回值出现第一次的位置(可选参数start:起始位置,stop;结束位置):测试时出现了问题
def index(self, value, start=None, stop=None): # real signature unknown; restored from __doc__ """ T.index(value, [start, [stop]]) -> integer -- return first index of value. Raises ValueError if the value is not present. """ return 0
使用方法:
t = (11,22,33,44,55,22,44,22)#t1 = ('this','is','test')print(t.index(22))#print(t1.index(is,10,20))### 输出结果1
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