Python - [function decorator | closure] - Notes on reading (chao)

This article is from Chapter 7 of fluent Python (First Edition): function decorators and closures. Since I was just learning Python, taking notes can be said to be a complete transcription, and I'm becoming more and more apathetic at the back, so I don't want to copy (taking notes) anymore. From page p1 ...

Posted by webwiese on Thu, 25 Jun 2020 10:36:45 +0200

Use decorator to decorate the class method and call the class method in the decorator.

Decorator methods outside the class decorate class methods and call other methods of the class Scenario: a class that links to a database often disconnects when performing database operations. At this time, you need to call the class's connect database method to re link to the database class My_dbclient(): def __init__(self): self.t ...

Posted by bschwarz on Tue, 23 Jun 2020 12:36:23 +0200

Crawler cracking 12306 verification code to realize login operation

Crawler cracking 12306 verification code to realize login operation 1, Preparation 2, Full code 3, Code analysis 1, Preparation Before crawling, let's see what the 12306 verification code looks like See this verification code, have wood very flustered, this tm can also crack??? Answer: of course ...

Posted by mr_tron on Tue, 23 Jun 2020 04:18:34 +0200

Basic process of Python data analysis

Generally speaking, the basic process of data analysis includes the following steps: 1. Ask questions - the metrics we want to know (average consumption, age distribution of customers, turnover trends, etc.) 2. Import Data - Import the original data source into Jupyter Notebook (web crawlers, dat ...

Posted by master123467 on Tue, 23 Jun 2020 03:17:01 +0200

Self study python for one year, and finally transform into a java Engineer!

The language is the same, no matter c, python or java, the syntax feels similar, but Python is really hard to find a job. Several recruitment platforms have looked around, and there are only a few, so they sprouted the extension java route to make up for the advantages of job search. In the future, you ...

Posted by popsiclesph on Sun, 21 Jun 2020 10:24:05 +0200

OO Unit 3 Summary

1. The theoretical basis and application tool chain of JML 1. Theoretical basis Atomic expression \result: Represents the return value of a non-void method after execution. \old(expr): Indicates the value of an expression expr before executing the corresponding method \not_assigned(x, y,...): Indicates whether the variable in ...

Posted by shawnyoung on Sun, 21 Jun 2020 03:10:32 +0200

Python tips you may not know

Note: the following tips are based on Python 3 Exchange variable value a, b = 1, 2 print("Assignment:", a, b) # Exchange variable value a, b = b, a print("Exchange:", a, b) Assignment: 1 2 Exchange: 2 1 Chain comparison a = 5 print(1 < a < 10) print(5 < a < 10) True False String ...

Posted by tazgalsinh on Sat, 20 Jun 2020 10:42:18 +0200

I was asked why I learned Python crawler, because I like my little sister

Baidu sexy beauty wallpaper to understand, for nothing else, is to be able to better learn Python! Do you believe that? As long as I see the website with photos of my sister, I just want to download them in bulk!   Why to learn about web crawlers(1) Learning the web crawler, you can customize a search engine to better understand the principle o ...

Posted by kappaluppa on Sat, 20 Jun 2020 05:55:04 +0200

"Office Automation" Land Classification of Territory "Three adjustments", "One key" to Nanjing Classification

Recently, the practical village planning under the system of territorial spatial planning has been expanded in a large area, "three-tone" data is directly facing the problem of converting the current land use. Today, we will talk about the method of "one key" conversion through code. ...

Posted by tpc on Sat, 20 Jun 2020 04:56:20 +0200

Session, Tensor, Variable OP

Rimeng Society AI: Keras PyTorch MXNet TensorFlow PaddlePaddle Deep Learning Actual Warfare (Update from time to time) 2.3 Sessions, Tensors, Variables OP Learning Objectives target applicationSess.runOr eval runs the diagram program and gets the tensor value Apply feed_dict mechanism to ...

Posted by Pinkerbot on Sat, 20 Jun 2020 03:37:48 +0200