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preface Hi! hello everyone! Recently, most of the hot lists on CSDN are Python crawler articles. It can be seen that everyone's enthusiasm for Python is still very high, so I code this article overnight these days in combination with some tutorials. If you want technical exchange, you can go to my home page and have technical exchange together ...

In the previous chapter, we rewritten the authentication mechanism of django. This chapter enriches the user api, that is, the addition, deletion, modification and query of users. user management User management involves operations on passwords, so write a new serializer and override def create(...),def update(...) method: # user_info/seria ...

Run multiple windows This is where PySimpleGUI continues to be simple, but the problem space has just entered the "complex" field. If you want to run multiple windows in an event loop, there are two ways to do this. When the second window is visible, the first window does not remain active The first window remains active while the se ...

Python wechat ordering applet course video https://edu.csdn.net/course/detail/36074 Python practical quantitative transaction financial management system https://edu.csdn.net/course/detail/35475 Kotlin collaboration series article navigation: Kotlin process I - Coroutine Kotlin collaboration process 2 - Channel Kotlin collaboration process I ...

Summary of Qianfeng education python2104 Seventh summary: dictionaries and collections catalogue Addition, deletion and modification of dictionaryDictionary related operationsaggregatecharacter stringtask text 1. Addition, deletion and modification of dictionary """ 1. Additions and modifications DICTIONARY [key] = value - when the key ex ...

Python POST crawler crawls Nuggets user information 1. General Python third-party library requests provides two functions for accessing http web pages, get() function based on GET mode and post() function based on POST mode. The get function is the most commonly used crawling method. It can obtain static HTML pages and most dynamically loade ...

Getting started with Python - day 4 Application of branch and loop structure The importance of branch and loop structure in Python is self-evident. It is the basis of constructing program logic. We need to strengthen programming practice. Exercise 1: Find the number of daffodils between 100 and 999 (the cube sum of each number is just equal ...

Today, let's look at an interesting problem in data preprocessing: how to deal with missing values. Before we discuss the problem, let's review some basic terms to help us understand why we need to focus on missing values. The content of this article is long. I suggest learning after collection. I like to praise and support it. catalogue Int ...

Reference: Object oriented encapsulation encapsulation The core of the three object-oriented features Encapsulation < - > consolidation Hide encapsulated attributes How to hide attributes: add before the attribute name__ Prefix, you will achieve an external hidden attribute effect class Foo: __x = 1 def __f1(self): ...

sort Sorting is an algorithm that arranges data in a certain order. The following are introduced one by one. 1, Bubble sorting Bubble sorting is to compare the elements between lists in pairs, and the large exchange position is to the right. In the first pairwise comparison, the largest element must be placed on the far right, so the second ...