1 def count(self, value): # real signature unknown; restored from __doc__
2 """ T.count(value) -> integer -- return number of occurrences of value """
3 return 0
1 练习1、统计元组中元素出现次数 2 aa = ("rhel",34,"fdsf","rhel","dsss",456,"rhel") 3 k = aa.count("rhel") #计算元组中指定元素出现的个数 4 print(k) 5 #执行结果: 6 3
1 def index(self, value, start=None, stop=None): # real signature unknown; restored from __doc__
2 """
3 T.index(value, [start, [stop]]) -> integer -- return first index of value.
4 Raises ValueError if the value is not present.
5 """
6 return 0
1 #练习2、找出指定元素的索引位置 2 aa = ("rhel",34,"fdsf","rhel","dsss",456,"rhel") 3 k = aa.index("rhel") #寻找指定元组元素的索引位置,有重复则输出最前面的索引位置 4 print(k) 5 #执行结果: 6 0
1 #练习3、元组与列表的转换 2 li = [11,22,33,"wer","are",] 3 aa = ("rhel",34,"fdsf","rhel","dsss",456,"rhel") 4 print(type(li)) #列表的类是list,列表的所有功能都在类里面 5 print(type(aa)) #元组的类是tuple 6 print(tuple(li)) #元组和列表是可以相互转换的 7 print(list(aa)) 8 #执行结果: 9 <class 'list'> 10 <class 'tuple'> 11 (11, 22, 33, 'wer', 'are') 12 ['rhel', 34, 'fdsf', 'rhel', 'dsss', 456, 'rhel']