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introduction —— stay Python in , Save important data information in the project through data structure .Python The language has built-in multiple data structures , For example, a list of , Tuples , Dictionaries and collections, etc . In this class, let's talk about Python A big data structure that is of great importance in —— Tuples .

stay Python in , We can think of tuples as a special kind of list . The only difference between it and the list is ： Data elements in tuples cannot be changed 【 This one doesn't change —— Not only can you not change the data items , And you can't add or delete data items ！】. When we need to create a set of immutable data , Usually put this data into tuples ~

1. Of a tuple establish && visit

（1） Tuple creation ：

stay Python in , The basic form of creating tuples is in parentheses “()” Enclose data elements , Use commas between the elements “,” separate . as follows ：

tuple1 = ('xiaoming', 'xiaohong', 18, 21)
tuple2 = (1, 2, 3, 4, 5)

#  and —— Yes, you can create empty tuples ！
tuple3 = ()

#  Little attention —— If the tuple you create contains only one element , And don't forget to put a comma after the element . Let it be recognized as a tuple ：
tuple4 = (22, )
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（2） visit ：

Tuples are similar to strings and lists , The indexes are all from 0 Start , And can be intercepted and combined . as follows ：

tuple1 = ('xiaoming', 'xiaohong', 18, 21)
tuple2 = (1, 2, 3, 4, 5)

#  The index in the display tuple is 1 The value of the element 
print("tuple1[1]:", tuple1[0])

#  Displays the index from the tuple 1 To 3 The value of the element 
print("tuple2[1:3]:", tuple2[1:3])
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2. Of a tuple modify && Delete

（1） Modification of tuples ：

Although it is said at the beginning that tuples are immutable , But it still has a supported operation —— Join and combine tuples ：

tuple1 = ('xiaoming', 'xiaohong', 18, 21)
tuple2 = (1, 2, 3, 4, 5)

tuple_new = tuple1 + tuple2
print(tuple_new)
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（1） Deletion of tuples ：

Although tuples are immutable , But it can go through del Statement to delete the entire tuple . as follows ：

tuple1 = ('xiaoming', 'xiaohong', 18, 21)

print(tuple1)		#  Normal print tuple1

del tuple1

print(tuple1)		#  Because it deleted tuple1, So printing again will report an error ！
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