Python

In Python programming, you often need to output the results in print, and if you want the output to be displayed on the IDE's screen or in a file (such as TXT), what should I do?Method 1You can output information to a file or screen via the Log

Reprint: http://www.jb51.net/article/59296.htmRecently encountered a problem is to specify parameters to run a particular process, which is very similar to some of the parameters of Linux commands, such as ls-a, why the plus-a option will respond.

# no parameters and returned functions def say_hi (): print ("hi!") Say_hi () Say_hi () # has parameters, no return value Def print_sum_two (A, B): C = a + b print (c) Print_sum_two (3, 6) def hello_some (str): print ("Hello" + str + "!")

# One, create tuple # Tup1 = (' Physics ', ' Chemistry ', 1997, #) # tup2 = (1, 2, 3, 4, 5) # tup3 = "A", "B", "C", "D" # tuples containing only one element, need to be Add a comma after the element to disambiguate # Tup1 = (50,) # Two, access

def choose_sort(raw_list): """对列表选择排序""" # 循环次数控制n-1 for times in range(len(raw_list)-1): # 循环开始先假设第一个元素为最小值 min_value = raw_list[times] # 遍历列表中的无序部分　如果元素小于min_value 就给min_value重新赋值 if raw_list[times] Python

Using multithreading and queues to implement producer consumer models#-*-Coding:utf-8-*-__author__ = "MuT6 sch01ar" Import threadingimport queueimport timeq = queue. Queue () def Producer (name): count = 1 while True: q.put

Hello World Programprint("Hello World!")Then execute the output:Hello World!Execute under InteractivePython 2.7.14 (v2.7.14:84471935ed, Sep 16 2017, 20:25:58) [MSC v.1500 64 bit (AMD64)] on win32Type "copyright", "credits" or "license()" for more

Import BinasciiFrom PydesImport desCbc, PAD_PKCS5Import UUIDImport time# pip Install-i https://pypi.tuna.tsinghua.edu.cn/simple pydesSecret_key =' 19771011 '# Http://blog.csdn.net/lihao21/article/details/78557461?locationNum=11&fps=1DefDes_encrypt

Multi-process open multiple processes to execute scripts#-*-Coding:utf-8-*-__author__ = "MuT6 sch01ar" import multiprocessingimport timeimport threadingdef My_Thread (): Print ("Running Thread") def my_process (n): time.sleep (2) print

Because the HTTP protocol is a stateless protocol (if the login is successful when accessing other Web pages of the site, the login state disappears), the session information needs to be saved, through a cookie or sessionCookiesSave all the reply

Achieve goals 1. The ancient Poetry website crawls the Tang and song Ci2. Landing to local database Page analysis Page positioning via Firedebug:SOURCE Location:Locate div tags according to lxml etree:#  page Analysis

develop a sensitive word filter that prompts the user to enter comments if the user enters content that contains special characters:#list of sensitive words li = ["Cang teacher", "Tokyo Fever", "Enrique", "Yui Hatano")#The sensitive words in the

The code is as follows:1 Importdatetime2 Import Time3 4Datetime_format ="%y-%m-%d%h:%m:%s"5Date_format ="%y-%m-%d"6 7 defget_now_timestamp_13 ():8 returnInt (time.time () *1000)9 Ten defget_now_date (): One returntime.strftime (date_format)

Python BasicsOne, Windows installation Python3.5: Https://www.python.org/ftp/python/3.5.2/python-3.5.2rc1-amd64.exeDouble-click Install in directory c:/python35Setting environment variablesAdd a newly installed Python directory later to open the

Adorner:Definition: Essentially a function (used to decorate other functions, i.e. add additional functionality to other functions)Principle: 1. Cannot modify the source code of the decorated function2. Cannot modify the calling mode of the

First, what is the __init__ method?Students who have written object-oriented code in Python may be familiar with the __init__ method, and the __init__ method is often used to initialize a class instance. For example:#-*-Coding:utf-8-*-class Person

The regular expression, which is simpler, is a matching function, in Python, as long as the re module is referenced, you can do regular matching operationsOne, Math matchLet's look at a simple exampleImport Rere.match (pattern, data_source)

Address_info = {"China": {"Shanxi": {"Taiyuan": ["Small Shop", "Yinze"],"Changzhi": ["eldest son", "Changzhi County"]},"Shaanxi": ["Hanzhong", "Xianyang"],"Hebei": ["Shijiazhuang", "Handan"]},"United States": {"New York": ["a", "B"],"Miami": ["C",

CSS selectors commonly used selectors are as follows: 1, Tag Selector tag Selector, this kind of selector has a large scope of influence, it is recommended to apply in the hierarchy selector as far as possible. Example:

if __name__ = = ' __main__ ':When you open a. py file, you will often see if __name__ = = ' __main__ ' at the bottom of the code: Now let's introduce its role.The module is an object, and all modules have a built-in property of __name__. The value