head first programming python

1. Python socket module built-in method2, the TCP server pseudo-code3. TCP Client Pseudo-code4. Socket Module Properties5. A simple TCP client and service-side code:# encoding:utf-8from Socket Import *from time import ctimefrom datetime import *# define TCPServer listening port number host = ' 0.0.0.0 ' port = 2 1567ADDR = (HOST, PORT) buffsize=1024# Initializes a TCP Sockettcpsvrsock = socket (af_inet, Sock_stream) tcpsvrsock.bind (ADDR) Tcpsvrsock.l

Python (pronunciation: English [? Pa?θ?n], beauty [? Pa?θɑ:n]), is an object-oriented, literal translation of computer programming language, but also a powerful general-purpose language, has nearly 20 years of development history, mature and stable. It contains a comprehensive set of standard libraries that are easy to understand and can easily accomplish many common tasks. Its syntax is very simple and cle

The example explains the @ property modifier usage in Python programming, and python @ property Value and value assignment class Actress(): def __init__(self): self.name = 'TianXin' self.age = 5 Class Actress has two member variables: name and age. External operations on the member variables of the class mainly include value and value assignment. The simpl

, and then gives the corresponding properties. Please do the same experiment on the types module. Make a note of the types you are familiar with, including your knowledge of these types, and then note the types that you are not familiar with. In the process of learning Python, you will gradually become "familiar" with the "unfamiliar" type.Edit by VheavensEdit by Vheavens4–8. Lists and tuples. What is the same point for lists and tuples? What are the

=os_info_in.os_info_in ()9 defOs_info (self):Tenself.linux_stat=linux_status.linux_status () OneSelf.linux_stat.os_version =self.os_infos_in.os_version () ASelf.linux_stat.os_kernal =Self.os_infos_in.os_kernel () -Self.linux_stat.os_date =self.os_infos_in.os_date () - returnSelf.linux_stat the defOs_in_mysql (self): -os_db=MySQL () -Os_db.os_insert (Self.os_infos_in.os_version (), Self.os_infos_in.os_kernel (), Self.os_infos_in.os_date ())linux_fdisk.py:def Fdisk_mysql (self):

Python object-oriented programming, python object-oriented In the previous chapter, I learned a lot about python-socket programming by reading books. One important point is that I don't know what the python class is. What is the m

Python network programming, TCP/IP client and server, 2015 python I have never been very clear about the definition of the server, and I have only a vague feeling about what the server/client architecture is. I recently started to learn about the relationship between some servers and clients. A server is a service provider. It is a hardware or software that can p

Detailed description of object generation methods for PHP object-oriented programming, and detailed description of python Object-Oriented Programming This article describes the object Generation Method of PHP object-oriented programming. We will share this with you for your reference. The details are as follows: Object

Python multi-thread and python multi-thread programming First, describe the multi-thread Application Scenario: When python processes multiple tasks, these tasks are essentially asynchronous and require multiple concurrent transactions, the running sequence of each transaction can be uncertain, random, and unpredictable

The example explains the proxy mode and abstract factory mode of Python Design Mode Programming, and the python design mode. Proxy ModeThe Proxy mode is A common design mode. It is mainly used to provide A 'agent' access to an object (such as B) (such as A) through an object (such as. For example, if an object is not directly referenced, the proxy acts as an inte

sockets to local IP and ports# Socket.socket (Socket.af_inet,socket. SOCK_STREAM), S.bind ()2 Start listening for connection #s. Listen ()3 Enter the loop and continuously accept the client's connection request #s. Accept ()4 then receive the incoming data, and send the data #s. recv (), S.sendall ()5 When the transfer is complete, close the socket #s. Close ()TCP Client:1 creating sockets, connecting remote addresses# Socket.socket (Socket.af_inet,socket. SOCK_STREAM), S.connect ()2 Send data

. However, there are several parallel modes that can be implemented through the built-in module multiprocessing:Multi-process: for CPU-intensive programs, you can use multiprocessing Process,pool and other packaged classes to implement parallel computing in a multi-process manner. However, because the communication cost in the process is relatively large, the efficiency of the program that requires a lot of data interaction between processes may not be greatly improved.Multithreading: For IO-int

But what are Python and why are it the language of choice by many DevOps engineers?What is Python? Why are so many devops engineers choosing Python?Here is an explanation from the PSF (the Python software Foundation):Python is aninterpreted,object-oriented,High-levelProgramm

My life is short. I use Python: A Brief History of development in a programming language Python is a simple, elegant, and easy-to-use language. Two days ago, I was excited about the benefits of Python to my friends. "Okay, I admit that Python is good, but why is it called

()returnk, Data g_lock.release ()return "', -1def sig_process (SIG, frame):Globalg_exit g_exit=1Print'Catch Signal'def run_thread (num):GlobalG_exitGlobalG_semGlobalG_lock name="'Data= -1 while 0==G_exit:g_sem[num].acquire () whiletrue:name, Data=get_event (name)if "'==Name: BreakG_lock.acquire () print name, Data g_lock.release () def test_thread ():GlobalG_exit while 0==G_exit: forIinchRange -): Add_event ('1', (I 2) +0) add_event ('2', (I 2) +1) add_event ('3', (I 2) +2) add_event ('4',