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Rent price analysis of rental housing in Shanghai In this paper, we use crawler to crawl the housing rental data of Shanghai, and use python to clean, analyze and display the data, and carry out data mining modeling and prediction for housing rent. # Import related packages import pandas as pd import numpy as np import seaborn as sns import ma ...

Exception capture 1. What is exception capture """ The program can continue to run if there is an exception in the process of program execution. Note: you don't need to use exception capture all the time. You should use it when you know that there may be an exception in a certain place and you don' ...

preface The text and pictures of this article are from the Internet, only for learning and communication, and do not have any commercial use. The copyright belongs to the original author. If you have any questions, please contact us in time for handling. Install pygame and create a ship that can mo ...

python multitasking process 1, First demo 2, Queue 3, Process Pool 4, Case: file copying 5, Summary 1, First demo Process: after a program runs, the resource used by code + is called process, which is the basic unit of non allocated resources of the operating system. Multitasking completed by t ...

Enumeration is a new data type in JDK 1.5. With enumeration, we can well describe some specific business scenarios, such as spring, summer, autumn and winter in a year, Monday to Sunday in a week, and various colors, as well as some state information, such as error codes. Enumeration type not only exists in Java language, but also can be found ...

Python asynchronous programming preface Now it's Python 3.5 and it has entered the asynchronous era Because of the existence of GIL (global lock), python can not play the advantage of multi-core, and its performance has been criticized. However, in IO intensive network programming, asynchronous processing is hundreds of times more efficient ...

As mentioned in the previous article, Python is simple and efficient because it has rich functions that can be used immediately. Recently, I read some technical articles of Github and found some interesting and practical Python libraries. It's a feeling that I'm too late to meet each other. Today, I wil ...

catalog A line of code to realize the cardioid pattern Two lines of code to make special dynamic QR code Four lines of code generate exclusive word cloud: Draw polygonal lines in five lines of code: Ten lines of code to draw sunflower: Twenty lines of code to realize the game of Jingzi chess 2 ...

When developing Python applications, the system has only one version of Python 3 installed: 3.x. All third-party packages will be installed by pip in the site packages directory of Python 3. If we want to develop multiple applications at the same time, these applications will share the same python, w ...

Dictionaries The dictionary refers to 1. How to access and modify information in a dictionary. 2. How to traverse the data in a dictionary, 3. A list of dictionaries to store, a dictionary to store lists, and a dictionary to store dictionaries. A dictionary is a series of key-value pairs that can be u ...