Tenth lesson of Python learning-basic data type (tuple)

• Meta-group

tuples and The list is almost the same, The difference is that the elements of the tuple after the creation of tuples can not be modified, such as (add, expand, remove, and so on, but the elements of the elements of the tuple can be modified)

Tuple built-in functions

Function	Function
CMP (TUPLE1,TUPLE2)	Comparison of two tuple elements
Len (tuple)	Calculating the number of tuple elements
Max (tuple)	Returns the maximum value of an element in a tuple
MIN (tuple)	Returns the element minimum value in a tuple
Tuple (SEQ)	Convert a list to a tuple
Count (P_object)	Count the number of occurrences of an element in a tuple
Index (self)	Gets the index position of the specified element in the tuple

Basic Operation: Index slices Loops length include

#!/usr/bin/env python#-*-coding:utf-8-*-A= ("Zou","Lu","Chen") b=("Bob","John") C=CMP (A, B)Print(c)#returns 1 in a tuple with more than 1 elements in BPrint(A.count ("Zou"))#returns 1Print(A.index ("Zou"))#returns 0D=Len (a)Print(d)#returns 3 tuple a with 3 elementsE=Max (a)Print(e)#back to Zouf=min (a)Print(f)#back to Chena=["Zou","Lu","Chen"]h=tuple (a)Print(h)#return (' Zou ', ' Lu ', ' Chen ')

Creating tuples

#!/usr/bin/env python#-*-coding:utf-8-*-A= ("Zou","Lu","Chen")#orB=tuple (("Zou","Lu","Chen"))

Tuple conversion tuples

(Convert Narimoto groups, iterative data variables that need to be converted) Note: The ability to convert Narimoto groups must be iterative, that is, can be used for loop

string, dictionary, List > can all convert Narimoto Group, convert Narimoto group can be for loop, the for loop every time the data is one element of tuple

# !/usr/bin/env python # -*-coding:utf-8-*-a=" Young No regrets "b=tuple (a)print(b )

Index

format: Tuple variable plus How to [index subscript]

# !/usr/bin/env python # -*-coding:utf-8-*-a= ("Zou","lu"," Chen " print (a[1])# prints out LU prints elements labeled 1

Slice

format: Tuple variable plus [Start subscript: End subscript]

# !/usr/bin/env python # -*-coding:utf-8-*-a= ("Zou","lu"," Chen " )print(A[0:3])

#打印出lu prints elements with elements subscript 0 to 2

Len (P_object)

(Number of elements in the statistical tuple)

# !/usr/bin/env python # -*-coding:utf-8-*-a= ("Zou","lu"," Chen " print(Len (a))# prints out 3 prints the total number of elements in the tuple

While loop

# !/usr/bin/env python # -*-coding:utf-8-*-a= ("Zou","lu"," Chen " ) b=0 while b<Len (a):    print(a[b])    b +=1# prints out Zou Lu Chen loops all elements in the tuple

For loop

# !/usr/bin/env python # -*-coding:utf-8-*-a= ("Zou","lu"," Chen " ) for in A:    print(b)#  Print out all the elements of the Zou Lu Chen loop out of the tuple sequentially

Count (self, value)

(Calculates the number of occurrences of an element in a tuple) the element to be calculated

# !/usr/bin/env python # -*-coding:utf-8-*-a= ("Zou","lu"," Chen " )print(A.count ("lu"))#

Index (self, value, Start=none, Stop=none)

(Gets the index position of the specified element in the tuple) the element to find, start position, end position

# !/usr/bin/env python # -*-coding:utf-8-*-a= ("Zou","lu"," Chen " )print (A.index ("lu"))# prints out 1 

Element append for element in tuple

Tuple elements are not modifiable and append, that is, the tuple's children are not modifiable, the elements of the tuple element is the sun level can be modified

#!/usr/bin/env python#-*-coding:utf-8-*-A= ("Zou","Lu",["Chen","Job"]) b="John"a[2].insert (0,b)Print(a)#Print out (' Zou ', ' Lu ', [' John ', ' Chen ', ' Job ')

modifying tuples

element values in tuples are not allowed to be modified, but they can be combined in groups of tuples

The concatenation of tuples is equivalent to the aggregation of multiple sets

#!/usr/bin/env python#-*-coding:utf-8-*-A= ("Zou","Lu","Chen") b=("Bob","John") C=a+bPrint(c)#Print out (' Zou ', ' Lu ', ' Chen ', ' Bob ', ' John ')

Replication of tuples

#!/usr/bin/env python#-*-coding:utf-8-*-A= ("Zou","Lu","Chen") b=a*3Print(b)#Copy Tuple aC="Zou" inchb#checks if element "Zou" is in tuple B, returns true, otherwise falsePrint(c)

Functions of tuples

Conversion list

Index

Slice

For loop

Length

Reverse

Sort

Index location

Number of statistics elements

Tenth lesson of Python learning-basic data type (tuple)