[python magic method] iterator (_iter_ and _next_)

Articles Catalogue `_ iter_ and next_` Real Iterator summary There are many functions in python that start and end with which can complete many complex logic codes and improve the simplicity of the code. This paper mainly summarizes the magic m ...

Posted by mattwade on Wed, 21 Aug 2019 04:23:33 -0700

Introduction of metaclasses in python

Classes are also objects In most programming languages, a class is a set of code snippets that describe how to generate an object, which is also true in python. class ObjectCreator: pass my_object = ObjectCreator() print(my_object) """ //Output results: <__main__.ObjectCreator object at 0x037DACD0> """ But python's classes are mo ...

Posted by sgarcia on Wed, 21 Aug 2019 01:42:14 -0700

Python Learning Path 6

Catalog error handling try Document Reading and Writing read file Writing Documents PyMysql Query operation Insert operation update operation Delete operation Following "Python Learning Road Five": error handling   In the ...

Posted by brissy_matty on Wed, 21 Aug 2019 01:01:24 -0700

Python Public Number Development-Pigment Detection

Links to the original text: https://www.cnblogs.com/injet/p/9191993.html In the last article, we connected our program to the Wechat Public Number and returned the text and picture files sent by users as they are. Today, we analyze the user' ...

Posted by whizkid on Wed, 21 Aug 2019 00:22:32 -0700

python crawler crawls webpage pictures

Articles Catalogue Preface Knowledge content Dead work start 1. Browser opens destination page and F12 Analysis page structure 2. Crawling page elements through Beautiful Soup 3. Save pictures Preface When doing crawling, first of all, we ...

Posted by expert_21 on Tue, 20 Aug 2019 23:17:07 -0700

Thrift for the First Experience of RPC Framework

Thrift for the First Experience of RPC Framework Version description: thrfit 0.12.0 Module description: thrift-demo-java-api: Generating Java api with thrift thrift-demo-java-server: Java implements the Thrift server thrift-demo-java-client: Imp ...

Posted by dirkie on Tue, 20 Aug 2019 21:21:15 -0700

python form traversal

Get the information behind the login window Most web servers use the GET method of HTTP protocol to request information when they interact with data, and the page form can basically be seen as a way for users to submit POST requests. Just as Web ...

Posted by TurtleDove on Tue, 20 Aug 2019 20:06:26 -0700

Understanding the concepts of Python Iterative, Iterator and Generator

About me A thoughtful programmer ape, a lifelong learning practitioner, currently works as a team lead er in an entrepreneurship team. The technology stack involves Android, Python, Java and Go, which is also the main technology stack of our team. Github: https://github.com/hylinux1024 Wechat Public Number: Angrycode Iterable, Iterator and Ge ...

Posted by amithn12 on Tue, 20 Aug 2019 20:01:06 -0700

Continuation of ndarray Notes on Machine Learning

Index and Slice of Array Index of multidimensional arrays 1 import numpy as np 2 arr=np.arange(1,25).reshape(2,3,4) 3 arr 4 # output array([[[ 1, 2, 3, 4], 5 [ 5, 6, 7, 8], 6 [ 9, 10, 11, 12]], 7 8 [[13, 14, 15, 16], 9 [17, 18, 19, 20], 10 [21, 22 ...

Posted by mmoussa on Tue, 20 Aug 2019 06:54:43 -0700

Python Command Line Travel - Deep into argparse

Author: Hello GitHub-Prodesire Hello GitHub's "Explaining Open Source Projects" series, project address: https://github.com/HelloGitHu... Preface In the first article "A Preliminary Exploration of argparse", we have a preliminary grasp of the use of argparse's tetralogy, which has a basic sense of body.But what types of par ...

Posted by aaaaCHoooo on Tue, 20 Aug 2019 01:08:04 -0700