Crawler project 18: use Python to crawl all recruitment information of all cities in the pull hook network

preface Use selenium+requests to visit the page and crawl the hook bar recruitment information Tip: the following is the main content of this article. The following cases can be used for reference 1, Analyze url By observing the page, we can see that the page data belongs to dynamic loading, so now we get the data packet through the ...

Added by ashu.khetan on Tue, 08 Mar 2022 04:27:14 +0200

Training of the first linear regression

you can run the program if you want Reference here . For ndarray and autograd, please refer to the previous blogs. preface    now there is a function, y=w*x+b, W, b is known, so give an X, you can find the corresponding y.    but when w and b are unknown, we only give a pair of X and Y. the obtained W and b may on ...

Added by OilSheikh on Tue, 08 Mar 2022 03:01:53 +0200

PYTHON get mail sending time

Today, I continued to pile on the hill where I wrote it. The problem is as follows: use python to get the sending time of mail. CSDN is a bad place: Daniel basically doesn't have it. If there is Daniel, he doesn't care to solve this problem. python has a module email, but it does not encapsulate the function of obtaining time. Encapsulates on ...

Added by dandare on Tue, 08 Mar 2022 02:56:05 +0200

[OpenCV4] detailed explanation of Grabcuts image segmentation algorithm

The content shared in this article comes from the book "learning OpenCV 4: Python based algorithm practice", which is as follows: Chapter 1 OpenCV Quick start; Chapter 2 image reading and writing module imgcodecs； Chapter 3 core library module core； Chapter 4 image processing module imgproc(1) (a); Chapter 5 image processing module ...

Added by jasonc310771 on Tue, 08 Mar 2022 02:06:13 +0200

LeetCode notes (algorithm idea 5)

8, Mathematics 204. Count prime Count the number of all prime numbers less than non negative integer n. Example: input: 10 output: 4 explain: There are four prime numbers less than 10, They are two, 3, 5, 7 . Idea: this problem needs to consider optimization in order to make the algorithm efficient. Using the eratoseni sieve method ...

Added by PeterPopper on Mon, 07 Mar 2022 22:55:00 +0200

1, Django - Django introduction, virtual environment configuration and Django installation

1, Introduction to Django 1.1 introduction to Django Django, released in 2005, is the most famous and mature network framework in the python world. A web site originally used to produce online news. Django is an open source web application framework written in python (the source code is open source and complies with BSD copyright). MVC fra ...

[source code analysis] multi process architecture and model of parallel distributed task queue Celery

[source code analysis] multi process architecture and model of parallel distributed task queue Celery 0x00 summary Celery is a simple, flexible and reliable distributed system that processes a large number of messages. It focuses on asynchronous task queue for real-time processing, and also supports task scheduling. Because celery improve ...

Added by new2phpcode on Mon, 07 Mar 2022 21:27:03 +0200

#coding:utf-8 #Import warnings package and use filter to ignore warning statements. import warnings warnings.filterwarnings('ignore') import pandas as pd import numpy as np import matplotlib.pyplot as plt import seaborn as sns import missingno as msno ## 1) Load training set and test set; path = './' Train_data = pd.read_csv(path+'car_train_ ...

Added by TheTitans on Mon, 07 Mar 2022 20:15:56 +0200

Experiment of deep learning and natural language processing -- Calculation of Chinese information entropy

Problem description First read enterprise_ of_ English_ Peter Brown, refer to the above article to calculate the average information entropy of Chinese. Database: https://share.weiyun.com/5zGPyJX Experimental principle Information entropy The concept of information entropy was first proposed by Shannon (1916-2001) in 1948 based on the c ...

Added by LuiePL on Mon, 07 Mar 2022 19:32:41 +0200

Basic learning of Python [python programming from introduction to practice reading notes (three in a row)]: django learning notes web project

The website deployed by oneself still has a small sense of achievement. After all, it has stepped on many pits, and its actual combat skills have made some progress. Website (customized later): https://murmuring-escarpment-91471.herokuapp.com/ Django project: learning notes web page Establish virtual environment To use Django, you fi ...