Python

1. Write an adorner to see when the function executesImport datetimeImport timedef jishi (fun): Def warper (): Start_time = Datetime.datetime.now () Fun () End_time = Datetime.datetime.now () Haoshi = (end_time-start_time).

1. Naming rules 1> do not start with a number, without the Chinese name 2> without the keyword Int/pass/def/return such as 3> use letters, numbers, underscores named like class_06224> Best can see the name of the idea Str_to_list2. Variablesx = 1 y =

1.Python Script Specification Base template#Coding:utf8ImportTime , RE, OS, sys, time,urllib2,shutil,stringImportJson,datetime#set UTF-8 encoding formatReload (SYS) sys.setdefaultencoding ("Utf-8" )#gets the first n days of the current

Import Randomdef Make_code (n): res= "for I in range (n): s1=chr (Random.randint (65,90)) S2=str ( Random.randint (0,9)) res+=random.choice ([s1,s2]) return Resprint (Make_code (9))#========= Implementing the Print

First look at the python source codeEmmmm, the description is the underlying C implementation, so only put the descriptionAnd look at other people's Kids ' blogs: 69944391Emmmm, the explanation is to go through the ASCII code.And look at our own

1, crawl the content of the Web pageUrlopen (URL) function: This function returns a Http.client.HTTPResponse object, which has various methods#coding =utf-8Import Urllib.requestUrl= "http://www.baidu.com/"Data=urllib.request.urlopen

JSON (Javascript Object) formatJson.dump () Two arguments: 1. Data to store 2. File objects that can be used to store dataAs F_obj with open (filename, ' W '):Json.dump (Numbers, f_obj)Json.load () load information from a file, 1 arguments: The file

If a class defines a __getattribute__() method, Python calls it each time a property or method name is referenced (except for a special method name, because that would result in an annoying infinite loop). If a class defines a __getattr__()

#单例的作用就是为了节约系统资源, every time you generate an object, you go back to taking up memory space, so the singleton can end the problem. #非单例模式, non-singleton mode in each instantiation will call memory, so the number of calls, it can cause memory waste

Three characteristics of an object Identity >>>a=1 >>>501794480 Type None (globally only one) >>>a=None>>>b=None>>>id (a) = =ID (b) True Numerical Int

Server side: gevent_server.pyImport sysimport socketimport timeimport geventfrom gevent import socket, Monkeymonkey.patch_all () def server (port): s = socket.socket () s.bind ((' 0.0.0.0 ', port)) S.listen ($) while True: cli,

1. Use only within the interpreter itself.Condition: Code in test.lianx_2.py:Class A (object): def __init__ (self,name): self.name=name def c (self): print ' name:%s '%self.nameb=a (' RR ') B.C () Results: NAME:RR__import__

Optional color scheme:A few of the usual: Color Map Description Autumn Red-orange-yellow Bone Black-White, X-ray Cool Cyan-Magenta

First, interface requirements1. Login interface(1) The session information is credited to the Redis database and the expiration time is 600 seconds after successful login(2) Construct the object that returns the result Flask.make_response ()(3)

#!/usr/bin/env python#coding:utf-8import osimport reimport sysscript_name = sys.argv[0] game_gen_path = ‘/data/bz-tw-and‘def callable(input_args): for (root,dirs,filename) in os.walk(game_gen_path): for file in filename: if re.match(input_args,file):

# title = "Alice in Wonderland"# Print (Title.split ())def count_words (filename): "Count how many words in a text file" Try WithOpen (filename)As F_obj:Contents = F_obj.read () ExceptFilenotfounderror: Pass #msg = "Sorry, the file" + filename + "

Use Pyinstaller to package. py scripts that can be run directly on other computers without the need for a Python environmentInstalling the Pyinstaller LibraryPip Install PystallerPackaging programPyinstaller-f *.pyWill generate three files, the

#脚本用于创建es索引及别名#!/usr/bin/pythonImport JSONImport requestsImport datetimeImport time#get Tomorrow Datenow = Datetime.datetime.now ()Delta = Datetime.timedelta (Days=1)N_days = Now + DeltatomorrowDate2 = Int (n_days.strftime ('%M '))//10str = '%d

What is a meta-classIn Python everything is object, the class is an object, the instance object is created by the class, and the class is created by the Meta class. In short, the class used to create the class is called a meta-class (Metaclass). The

Split () function:Returns a list that splits a string into multiple elements with the specified character1My_str ='name is wangxiaoming'2 3 Print(My_str.split ())#default no write parameter means cut by space character4 Print(My_str.split (' ',