Python, in addition to keywords (keywords) and built-in types and functions (Builtins), more functionality is provided through the libraries (that is, modules).
The commonly used libraries (modules) are as follows:
1 Python Runtime services
* The
I. Requirements
Second, train of thought
1. Shopping class Buy
Receive credit card class credit card available balances,
Return consumption amount
2. Credit card (ATM) class
After receiving the last operation, credit card Available Balance,
A good memory is better than a pen.
Two common types of network transport models:
I. OSI model layering
Professionals generally do not say that each layer of the name of the second is to say the first layer, which is equivalent to the level of the
1 Error phenomena
The HTTP service implemented by Threadinghttpserver, if the client is actively disconnected before the server returns, the server side will report [Errno] broken pipe wrong and cause the processing thread to crash.
Let's take a
[CSharp] View Plain copy using system.collections; using system.collections.generic; using system.net.sockets; using system.net; using system.threading; using system.text; public class SocketUDPServer {
Python3 introduces a series of backward incompatible changes. Most incompatibilities are mainly: removing ambiguity and error correction.
1. String Type
There are two types of characters in Python: Byte strings and text strings.
Version
Reprint AddressHttp://www.linuxidc.com/Linux/2015-08/121676.htmIn the MySQL database, when the inserted data cannot support Chinese, the encoding set of the database can be set to UTF8, so the database encoding set and other character encodings are
Detailed description of the use of Python WSGI and pythonwsgi
WSGI (Web Server Gateway Interface): an Interface between a Server program and an application defined in Python.
Web programs are generally divided into server programs and applications.
A basic component of network programming is socket (socket)A socket is an instance of the socket class in a socket module, and his instantiation requires 3 parameters:The first parameter is the address family (the default is socket.af_inet, the
PYthon multi-thread Server
It is divided into two parts, one for updating data and the other for responding to client requests.
from SocketServer import TCPServer, StreamRequestHandlerfrom time import ctimefrom SocketServer import
Recently a project because to use the socket transmission problem, so decided to learn a bit, the content of their own learning to share, the following article is mainly about C #. NET socket simple practical framework used in the relevant
The Code is as follows: {code ...} if the connection address is & #039; localhost & #039;, an error is reported, as follows: Warning: mysqli () :( HY0002002): Nosuchfileordirectoryinmntwwwcglevipublichtmlmysql. phponline2ConnectError... the Code is
Socket -- accept big data, socket -- accept dataI. Simple ssh Functions
1.1 implement functions
In the previous blog, we have implemented a simple small program similar to the Linux Server ssh function. You can enter a system command to return the
These days less classes, the campus network to authenticate to the Internet, every time must enter the number code, in order to facilitate, wrote an automatic login and if online, log in from the service system to force the offline gadget.Forced
Detailed explanation of http module and python Module
I haven't written a blog for a long time, because the blogger has started another wonderful internship experience this year, learning and working on projects, and the time is full. Thank you very
C # example of SOCKET sending and receivingSocket Client
Using System;Using System. Collections. Generic;Using System. Linq;Using System. Text;
Using System. Net;Using System. Net. Sockets;
Namespace A0140_SocketClient.Sample{
///
/// This class is
When a mysql-related fault occurs in the development or test environment, most of my friends may post on the Forum and discuss the problem with the QQ group. This method is one of the effective ways to get help. However, in a production environment
This article describes the differences between select, poll, and epoll by analyzing pythonselectepollpoll.
Select
Select first appeared in. it monitors arrays of multiple file descriptors through a select () system call (everything in linux is a
When a mysql-related fault occurs in the development or test environment, most of my friends may post on the forum and discuss the problem with the QQ group. This method is one of the effective ways to get help. However, in a production environment
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