Programmer Group

1, Preliminary understanding of Matplotlib 1. What is Matplotlib? It is specially used to develop 2D charts (including 3D charts)Realize data visualization in a progressive and interactive way 2. Matplotlib three-tier structure (1) Container layer Canvas: a tool for placing a canvas (Figure), which acts as a sketchpad Figure: ac ...

catalogue 1. Common errors in waiting and packaging of selenium 2. Call the contents in print and compare the data 3. Enterprise wechat group sending and webhook parameter configuration 4. Summary          1. Common errors in waiting and packaging of selenium         When climbing some dynamic data encrypted by the ...

In the actual process of building neural network, forward propagation is easy to realize and has high correctness; The implementation of back propagation is difficult, and there are often bug s. For items requiring high accuracy, gradient test is particularly important. Principle of gradient test The definition of derivative (gradient) in mat ...

1. Overview This is an application for target detection, followed by target detection (28 messages) YOLOv5 training its own dataset _ONEPIECE_00's blog - CSDN blog And target positioning (28 messages) Target Detection and Target Location _ONEPIECE_00 Blog-CSDN Blog To determine whether there are people on the seat based on the results of the d ...

Reuters data set For this news data set, this is a multi classification problem Dataset characteristics: Text classification datasetContains 46 different topicsThere are at least 10 samples for each topic in the training setThe dataset is in Keras and can be directly transferred in Difference between multi classification problem and ...

Before introducing generators and iterators, let's talk about__ iter__ () and iter() functions, and__ next__ () and next(), the iterator must understand these two functions. After learning object-oriented, you should know the methods in the object to__ Start with__ The methods at the end are built-in properties, so here__ iter__ And__ next__ I ...

Chinese history [Yandi Shennong tasted hundreds of herbs]: In ancient China, the leader of the tribe surnamed Jiang was honored as Shennong, also known as Lieshan. It is said that "Shennong tastes all kinds of grass" and teaches people medical treatment and farming. The Chinese regard it as the legendary inventor and patron saint of a ...

1. Object-oriented overview Object-oriented is a systematic way of thinking in which people understand the objective world, breaking down the affairs that constitute problems into objects, and establishing objects is not for completing a step, but for describing the behavior of an object in the whole process of solving problems. 1. Classe ...

Machine learning_ 1:K-nearest neighbor algorithm Experimental background This experiment is based on the classical k-nearest neighbor algorithm of machine learning. I will first introduce the principle of k-nearest neighbor algorithm and basic classification experiments, and then introduce how to use k-nearest neighbor algorithm for handw ...

1, Introduction to basic structure of crawling program The first is the library that the program needs to call: import requests import bs4 import os Then write a function to parse the HTML of the web page: headers={'User-Agent':'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.61 Safari/537.3 ...