python foundation - TCP protocol and UDP protocol
TCP is a streaming protocol, UDP is a packet protocol.
TCP and UDP are transport layer protocols in OSI model. TCP provides reliable communication transmission, while UDP is often used to let the broadcast and details control the application's communication transmission.
Summary of differences between TCP and UDP:
TCP
UDP
Is it connected? ...
Posted by lovelyvik293 on Fri, 06 Dec 2019 06:36:08 -0800
Introduction to java crawler
Compared with C ා crawler, java crawler, python crawler is more convenient and simple. First of all, the urllib2 package of Python provides a relatively complete API for accessing web documents. Second, for the picked articles, Python's urllib2 package provides a relatively complete API for accessing web documents beautifulsoap It provides a si ...
Posted by snteran on Fri, 06 Dec 2019 04:17:50 -0800
What exactly is AFNetworking like
AFNetworking is a well-known tripartite library for the iOS world and has completely replaced ASI.The latest AFNetworking3.0 has also been switched from NSURLConnection to NSURLSession for ease of use.As an experienced iOSer who is constantly exploring, you should also look at the internal merits of source enhancement.
1. Overview
First, look ...
Posted by Najjar on Thu, 05 Dec 2019 18:46:01 -0800
AI => Tensorflow2.0 syntax - use of the keras'api
Preface
Most of the keras interfaces implement the call method.The parent class call calls ().Therefore, almost all the model / network layers mentioned below can be called directly as functions after being defined.eg:
Model object (parameter)
Network layer object (parameter)
We can also implement inheritance templates
Import
from tensorflow i ...
Posted by SycoSyco on Thu, 05 Dec 2019 13:05:35 -0800
Optimize package size - PNG section
background
Compared with JPEG image, PNG image is a lossless image storage format, and there is an additional transparency channel, so in general, PNG image is larger than JPEG image, and PNG image is often the big head of APK image resources, so optimizing the size of PNG image is more rewarding for reducing the volume of packet.
wiki about P ...
Posted by mwmobley on Thu, 05 Dec 2019 12:08:02 -0800
Getting started with web crawler: your first crawler project (requests Library)
0. Use requests Library
Although the urllib library is also widely used, and it is not necessary to install it as a python library, most of the python crawlers now use the requests library to handle complex http requests. Requests are simple in syntax, easy to understand in use, and are gradually becoming the standard of most network crawling.
...
Posted by kriek on Thu, 05 Dec 2019 07:49:07 -0800
php uses the full calendar plug-in
Recently, I found a lot of plug-ins that are not easy to use when working on the project of curriculum. I accidentally saw the full calendar, which is very simple and convenient. I posted a project page first
<!DOCTYPE html>
<html>
<head>
<meta charset='utf-8' />
<!-- Calendar plug-in -->
<link href='/public/s ...
Posted by mostwantedunm on Thu, 05 Dec 2019 07:09:46 -0800
Function calculation, automatic operation and maintenance practice 3 -- event triggering, automatic snapshot creation
Function calculation
Ali cloud Function calculation Is an event driven fully hosted computing service. Through function calculation, you don't need to manage infrastructure such as servers, just write code and upload it. Function calculation will prepare computing resources for you, run your code in a flexible and reliable way, and provide log ...
Posted by pirri on Thu, 05 Dec 2019 05:17:53 -0800
Attachment to binary code - thread deadlock causes CPU to stay high
Business background:
Convert the accessories of system A into binary and spread them to system BOriginal code:
private byte[] imgToByte(String path){
URL u;
BufferedInputStream input = null;
ByteArrayOutputStream out = null;
try {
u = new URL(path);
input = new BufferedInputStream(u.openStream());
out = new Byte ...
Posted by twistisking on Thu, 05 Dec 2019 03:45:41 -0800
The principle and implementation of Android multithread breakpoint Download
During this time, I looked at the download components of the studio's tool library and found some problems:
1. There is a bug in the download core logic, and there is a probability that the download cannot be completed successfully when the download is suspended or fails.2. Although the original design adopts the design of multi-threaded brea ...
Posted by ogge1 on Wed, 04 Dec 2019 21:53:57 -0800