Python基础篇 tuple

1In [1]: # 直接创建元组，','分割，使用圆括号
2   ...: tupleObj = ('Riti', 31, 'London', 78.88)
3   ...: tupleObj
4Out[1]: ('Riti', 31, 'London', 78.88)

1In [2]: # 直接创建，','分割，不使用圆括号
2   ...: tupleObj = 'Jake', 23, 'paris' , 89.33
3   ...: tupleObj
4Out[2]: ('Jake', 23, 'paris', 89.33)

1In [3]: # 创建空tuple
2   ...: emptyTuple = ()
3   ...: emptyTuple
4Out[3]: ()

1In [4]: # 通过 list 创建 tuple
2   ...: listOfNumbers = [12 , 34, 45, 22, 33 ]
3   ...: tupleObj = tuple(listOfNumbers)
4   ...: tupleObj
5Out[4]: (12, 34, 45, 22, 33)

 1In [5]: # 使用 for 循环遍历元素
 2   ...: tupleObj = ('Riti', 31, 'London', 78.88)
 3   ...:
 4   ...: for elem in tupleObj:
 5   ...:     print(elem)
 6   ...:
 7Riti
 831
 9London
1078.88

1In [6]: # 初始化tuple
2   ...: tupleObj = (12 , 34, 45, 22, 33 , 67, 34, 56 )
3   ...: tupleObj
4Out[6]: (12, 34, 45, 22, 33, 67, 34, 56)

 1In [7]: # 使用成员运算符 in / not in 判断元素是否位于 tuple
 2   ...: if 34 in tupleObj:
 3   ...:     print("Element Found in Tuple")
 4   ...: else:
 5   ...:     print("Element not Found in Tuple")
 6   ...: print('*'*30)
 7   ...: if 1001 not in tupleObj:
 8   ...:     print("Yes, element Not In tuple")
 9   ...: else:
10   ...:     print("Element is in Tuple")
11   ...:
12Element Found in Tuple
13******************************
14Yes, element Not In tuple

 1In [8]: # 查找元素的索引，语法：tuple.index(x)
 2   ...: try :
 3   ...:     pos = tupleObj.index(34)
 4   ...:     print("Element 34 Found at : " , pos)
 5   ...: except ValueError as e:
 6   ...:     print(e)
 7   ...: print('*'*30)
 8   ...: try :
 9   ...:     pos = tupleObj.index(24)
10   ...:     print("Element 24 Found at : " , pos)
11   ...: except ValueError as e:
12   ...:     print(e)
13   ...:
14Element 34 Found at :  1
15******************************
16tuple.index(x): x not in tuple

1In [9]: # 核实元素在 tuple 中出现次数，语法：tuple.count(elem)
2   ...: count = tupleObj.count(34)
3   ...:
4   ...: print("Count of 34 in tuple is : ", count)
5Count of 34 in tuple is :  2

1In [10]: # 使用 count() 判断元素是否位于 tuple
2    ...: if tupleObj.count(34) > 0 :
3    ...:     print("34 Found in Tuple")
4    ...: else:
5    ...:     print("34 Not Found in Tuple")
6    ...:
734 Found in Tuple

1In [11]: # 使用运算符 + 并创建新元组
2    ...: tupleObj = (12 , 34, 45, 22, 33 )
3    ...: print("Original Tuple : ", tupleObj)
4    ...: tupleObj = tupleObj + (19 ,)
5    ...: print("Modified Tuple : ", tupleObj)
6Original Tuple :  (12, 34, 45, 22, 33)
7Modified Tuple :  (12, 34, 45, 22, 33, 19)

1In [12]: # 使用切片在指定索引插入元素
2    ...: tupleObj = (12 , 34, 45, 22, 33 )
3    ...: print("Original Tuple : ", tupleObj)
4    ...: n = 2
5    ...: # Insert 19 in tuple at index 2
6    ...: tupleObj = tupleObj[ : n ] + (19 ,) + tupleObj[n : ]
7    ...: print("Modified Tuple : ", tupleObj)
8Original Tuple :  (12, 34, 45, 22, 33)
9Modified Tuple :  (12, 34, 19, 45, 22, 33)

1In [13]: # 使用切片修改/置换指定索引的元素
2    ...: tupleObj =  (12, 34, 19, 45, 22, 33, 19)
3    ...: print("Original Tuple : ", tupleObj)
4    ...: n = 2
5    ...: # Replace the element at index 2 to 'Test'
6    ...: tupleObj = tupleObj[ : n] + ('test' ,) + tupleObj[n + 1 : ]
7    ...: print("Modified Tuple : ", tupleObj)
8Original Tuple :  (12, 34, 19, 45, 22, 33, 19)
9Modified Tuple :  (12, 34, 'test', 45, 22, 33, 19)

1In [14]: # 使用切片删除指定索引的元素
2    ...: tupleObj =(12, 34, 'test', 45, 22, 33, 19)
3    ...: print("Original Tuple : ", tupleObj)
4    ...: n = 2
5    ...: # Delete the element at index 2
6    ...: tupleObj = tupleObj[ : n ] + tupleObj[n+1 : ]
7    ...: print("Modified Tuple : ", tupleObj)
8Original Tuple :  (12, 34, 'test', 45, 22, 33, 19)
9Modified Tuple :  (12, 34, 45, 22, 33, 19)