[Python3] Tuple (tuple)

Overview

Tuples, identified with parentheses (), characterized by: elements in tuples are not modifiable

Let's look at an example of how to create a tuple:

Tuple1 = (U'deeptest', u'Open Source Optimization test', u'1') Tuple2= (1, 2, 3, 4, 5) Tuple3= ("a","b","C","D","e")

Built-in functions

The built-in functions commonly used in Python are:

• Len
  Number of elements used to calculate tuples

• Max
  Returns the maximum value of an element in a tuple

• Min
  Returns the element minimum value in a tuple

• Tuple
  Convert list to Narimoto Group

Let's take a look at the examples of these four functions:

#-*-coding:utf-8-*-__author__= u'Gubei'if __name__=="__main__": Tuple_demo= (1, 2, 3, 4, 5, 6, 7, 8, 9, 0)#calculating the number of elements in a Tuple_demo    Print(Len (tuple_demo))#returns the element with the largest value in Tuple_demo    Print(Max (Tuple_demo))#returns the element with the smallest value in the Tuple_demo    Print(min (tuple_demo))#Convert list to Narimoto groupList_demo = [1, 2, 3, 4, 5, 6] Tuple1=tuple (List_demo)#print a converted tuple    Print(Tuple1)

The results of the operation are as follows:

1090 (1, 2, 3, 4, 5, 6)

Slice

Because tuples are also a sequence, we can use the tiling mechanism of Python to access the elements at a specified location in a tuple, or to intercept one of these elements.

Let's look at an example of a slice operation:

#-*-coding:utf-8-*-__author__= u'Gubei'if __name__=="__main__":    Print(U"example of a tuple slice operation!") Data_demo= (U"deeptest", u"Appium", u"testingunion.com", u"Hello", u"Python3")        #Read the second element Appium, note index subscript starting from 0E = data_demo[1]    Print(e)#read the countdown to the second HelloE = data_demo[-2]    Print(e)#slices, intercepting all elements from the beginning of the 2nd elementE = data_demo[1:]    Print(e)#slicing, intercepting 第2-4个 elementsE = Data_demo[1:4]    Print(e)

Execution results are as follows

元组切片操作示例

 appiumhello (  " appium  ,  '  testingunion.com  , "  hello  , "    " ) (  '    hello   ' ) 

A summary of the above code:

• Tuples can read elements by subscript index

• Tuples can reverse-read elements by negative subscript index

• Tuples can intercept an element by starting: terminating

Merge

Attributes of elements of a tuple: not modifiable. But we can either merge the tuples or connect to generate a new tuple, the code example is as follows:

#-*-coding:utf-8-*-__author__= u'Gubei'if __name__=="__main__":    Print(U"example of a tuple merge or join operation!") Tup1= (U"deeptest", u"Appium") tup2= (U"testingunion.com", u"Hello"+ R"Python3")        #merging into a new tupleTUP3 = Tup1 +tup2#Print to see the effect    Print(tup1)Print(tup2)Print(TUP3)

Delete

Attributes of elements of a tuple: not modifiable. This means that we cannot delete a single element, but we can delete the tuple, for example:

#-*-coding:utf-8-*-__author__= u'Gubei'if __name__=="__main__":    Print(U"example of a tuple merge or join operation!") Tup1= (U"deeptest", u"Appium")    Print(tup1)#Delete a tuple    delTup1Print(TUP1)    

What happens when you execute the above code?

will prompt for output exception information, when:

Nameerror:name ' tup1 ' is not defined

Operation

Tuples and strings can be operated with + or *, and a new tuple can be generated after the operation.

#-*-coding:utf-8-*-__author__= u'Gubei'if __name__=="__main__":    Print(U"Tuple Operations Example") Tup1= (U"deeptest", u"Open Source Optimization test") tup2= (1, 2, 3, 4)            #calculate the element leader degree    Print(Len (tup1))#Tuple ConnectionsTUP3 = Tup1 +tup2Print(TUP3)#tuple ReplicationTUP4 = Tup1 * 2Print(TUP4)#determines whether the element is in a tuple, or returns TRUE, otherwise returnsresult = 5inchtup2Print(Result)#traversing tuples     forTinchtup2:Print(t)

List of tuples

Use the built-in function tuple to convert the list to the Narimoto group with the following code example:

# -*-coding:utf-8-*- __author__ = u' Gubei 'if__name__'__main__ " :         # Convert list to Narimoto group    List_demo = [1, 2, 3, 4, 5, 6]    = tuple (list_demo)            #  print converted tuples    Print(tuple1)

[Python3] Tuple (tuple)