Python Foundation 13_zip_import

Continuing with the built-in functions, the zip function is likened to a zipper that corresponds to the teeth on both sides.

#!/usr/bin/env python#Coding:utf-8#The analogy is like a zipper, which corresponds to both sides. #more out of the part, not for processing. Print(List (Zip ('a','b','C'), (11,22,33))))Print(List (Zip ('a','b','C'), (11,22,33,44))))Print(List (Zip ('a','b','C','D'), (11,22,33,))))#splitting the elements of a dictionaryDIC = {'name':'Tom',' Age': 22,'Gender':'male'}Print(list (Zip (Dic.keys (), dic.values () )))Print(List (Zip ('ABCDE','123456')))## Use the Zip method to handle the largest set of values in a dictionaryage_dic={'Tom_age': 81,'Jerry_age': 133,'Louis_age': 88,'Bob_age': 55}Print(Max (Age_dic.values ()))Print(Max (Zip (age_dic.values (), Age_dic.keys ())))#by turning V and K upside down, it's easy to use Max. Dic2=(    {'name':'Tom',' Age': 33},    {'name':'ABC',' Age': 88},    {'name':'Bob',' Age': 66},    {'name':'Jim',' Age': 44},)#Max can use the key method to pass a function in. #equivalent to the tuple or list for a For loop processing. Print(Max (Dic2, key=Lambdaitem:item[' Age']))

There are several other built-in functions:

#!/usr/bin/env python#Coding:utf-8Print(Pow (3,3))Print(Pow (3,3,4))#The third parameter is the remainder after 3**3a='python'S1= Slice (3,5)#Slice function#print (A[3:5])Print(a[s1]) S2=slice (3,6,2)#Step size is 2Print(A[s2]) b= [3,2,1,7,5]Print(sorted (b))#sort functionDiC= {'K11': 3000,'K6': 5000,'K3': 6000,'K4': 8000,'K2': 7000}#print (sorted (DIC))Print(Sorted (dic,key=LambdaK:DIC[K]))#sort by the value of a dictionaryPrint(Sorted (Zip (dic.values (), Dic.keys ()))#get the value sorted by value and keyPrint(sum (b))Print(Sum (range (5)))#from 0 to 4!Print(List (range 5)) msg='123'ifType (msg) isStr:#Type is used to determine variable types    Print(int (msg) +2)defTest (): a='ert'    Print(Locals ())#print variables in the current scope, in dictionary form    Print(VARs ())#when no parameters are equal to locals ()Test ()

and import and __import__.

Contents of the test.py file:

# !/usr/bin/env python # Coding:utf-8 def func ():     Print ('hello,python')

Content of test2.py:

# !/usr/bin/env python # Coding:utf-8 def ABC ():     Print ('aaaaaaaaaaaaaa')

Next, compare the usage differences between the two types of import

#!/usr/bin/env python#Coding:utf-8ImportTest#Import the test.py module, which is to import the contents of this file. Test.func ()#using functions in the test module## __import__ is the module that imports the string name form#m_name = ' test2 'm =__import__('test2')#To import a module named after a string, you must assign a value to the variablem.abc ()## # import >> sys >> __import__## import will call SYS, or use the __import__ method at the bottom. 

These are notes, may seem a bit messy, and so on after more and more familiar after the careful sorting.

Python Foundation 13_zip_import