Programmer Group

I. Introduction Beautiful Soup It is a Python library that can extract data from HTML or XML files. It can realize the usual way of document navigation, search and modification through your favorite converter. Beautiful Soup will save you hours or even days of working time Official Chinese document address: https://beautifulsoup.readthedocs.i ...

1, List generation: the list can be generated dynamically instead of using fixed values to assign values to the list, so the program will be more flexible def test(i): # Even number if i % 2 == 0: return i # Ordinary generative list1 = [i * 2 for i in range(10)] print(list1) # Select values through a function list1 = [test(i) ...

1, function The function in Python is a code segment for realizing a certain function, which can be reused. That is, don't build the wheel again. Use the function when you meet the scene, that is, functional programming Next, I define a my func, pass in a Hello World, and print a Hello World def my_func(message): print('Got a message: {}'.f ...

Programming and computer Summary Computer Five structures of computer: input device, memory, controller, arithmetic unit, output device Memory and arithmetic unit are collectively called CPU The computer operating system is responsible for the management of computer hardware resources - > system call programming Programming is a way of int ...

In addition to using performance testing tools for performance testing, we can also directly use python multithreading for performance testing. Next, use these modules to test the performance of a query interface: requests: send http request json: the returned string is converted to json format threading: multithreading Time: Stati ...

Yunqi information:[ Click to see more industry information]Here you can find the first-hand cloud information of different industries. What are you waiting for? Come on! I. Preface A lot of times we write a crawler, after realizing the requirements, we will find a lot to improve, and one of the most important points is the crawl speed. This art ...

Basic steps of building deep learning model Where to give an example: Boston house price forecast Boston house price forecasting is a classic machine learning task, similar to the "Hello World" of the programmer world. As we all know about house price, the house price in Boston area is influenced by many factors. This data set stati ...

Because the previously written interface was changed, the following was updated One: Data preparation phase All sources of this data are available from both locations 1. Epidemic Interface of Tencent Provinces and Cities 2. Tencent Epidemic History Daily Data Interface and Foreign Epidemic Data Interface Two: Tools and Environment IDE ...

1. Preview of running results Start Interface First level Second level Third level Level 4 Level 5 Game over 2. Introduction of Game Functions 2.1 Development Environment: python version: python 3.7 2.2 Related modules: pygame modules, as well as some modules that come with Python. 2.3 Introduction to the game: The game is timed in 120 s ...

Run the program, because of memory problems or other blabla blabla problems (not code problems altogether), the program may hang up occasionally, and we can't stare at the program all day. What can we do?It's a good idea to write a script to check if the program hangs up and restart if it does, depending on the operat ...