1, First, let's see how Python can simply crawl the web page1. Preparation The beautiful soup4 and chardet modules used in the project belong to the three-party extension package. If not, please install pip by yourself. I use pycharm to do the installation. Next, I will simply use pycharm to install chardet and beautiful soup4
Follow the steps ...
Posted by suspect on Sat, 23 May 2020 22:08:21 -0700
First question: use the requests library to visit Baidu homepage 20 times, and return the length of his text and content attributes.
1 # -*- coding: utf-8 -*-
3 Created on Tue May 19 10:12:16 2020
5 @author: 49594
8 import requests
9 url = "https://www.baidu.com/"
10 for i in range(20):
12 rest ...
Posted by RDx321 on Tue, 19 May 2020 07:45:21 -0700
Today, I'm going to pack a vue project that I've been working on recently. I'll run it to the test environment and test it by the way, but it appears when I don't want to pack it
ERROR in static/js/vendor.6ee331eab7d8c9bf1876.js from UglifyJs
Unexpected token name «i», expected punc «;» [static/js/vendor.6ee331eab7d8 ...
Posted by pulkit123 on Mon, 18 May 2020 08:45:29 -0700
CountDownLatch and Cyclic Barrier are two important tool classes for concurrent java programming. They are widely used in many multithreaded concurrent or parallel scenarios.However, each has its own emphasis on the internal implementation and use scenarios.
Internal implementation differences
The former relies more on classical AQS m ...
Posted by phpconnect on Sun, 17 May 2020 12:13:23 -0700
Extraction code: b1hb
Include the js library files needed for this section, as well as the api documentation for JQuery
Posted by GirishR on Tue, 05 May 2020 12:58:12 -0700
Threads are the execution units of programs, execution paths.Is the most basic unit of CPU used by programs
Multithreaded -- Programs have multiple execution paths to improve usage of application processes
The more threads in the process, the higher the probability of seizing CPU execution rights.Thread execution is random
How Java programs w ...
Posted by bogdan on Mon, 04 May 2020 23:59:15 -0700
Please refer to ...
Posted by Shane10101 on Mon, 04 May 2020 20:38:42 -0700
The addEventListener() method is not supported in Explorer 8 and earlier IE versions, and is not supported in Opera 7 and earlier Opera versions. However, for browsers that do not support this function, you can use the attachEvent() method to add event handles.
Explorer 8 and earlier does not support the remo ...
Posted by cliftonbazaar on Sat, 02 May 2020 21:41:11 -0700
In view of the fact that H5 video is quite different (compatible) in the Web ecological environment, this paper mainly introduces the usage of developing chimee component with qiwutuan to play video.
chimee component address:
2. Features of chimee components
Chimee supports MP4, M3U8, FLV an ...
Posted by morpheuz on Sat, 02 May 2020 09:14:05 -0700
When writing a web chat tool, the style of chat usually has a triangle or a small tail. At this time, there are two solutions, one is to use the image format, the other is to use css. This paper introduces the implementation of css.
Tail style implementation
Posted by aleigh on Thu, 30 Apr 2020 04:38:30 -0700