Programmer Think

Four modules of urlib urrlib.request urrlib.error urrlib.parse urrlib.robotparser Get page source code import urllib.request response=urllib.request.urlopen("http://www.baidu.com") print(response.read().decode('utf-8')) #Get Baidu's source code post request import urllib.parse import urllib.reque ...

1. Basic grammar Branch structure if i < 0: print("negative") elif i == 0: print("0") else: print("Positive number") Cyclic structure while while i < 100: print("HelloWorld") for # range(N) from 0 to n-1 for i in range(5): #Print 0~4 print("Hello:",i) #Result Hello: 0 comma for s ...

The project of generating DataMatrix based on qt and libdmtx, DataMatrix open source coding and identification Library: github of libdmtx: https://github.com/dmtx/libdmtx； The complete project I wrote in qt is: https://github.com/abcvincent/dmtxMaker； GitHub - > doc contains DataMatrix intern ...

this() If the proxy class matches the specified class according to the type, then all connection points of the target class to be proxy match the tangent point In general, this() and target() are used to match and define pointcuts. They are equivalent. The difference between them is reflected in the specific performance of generating ...

##On the self-cultivation of a reptile 2 (the first example uses Python to download a cat, and the second example uses Python to simulate the browser's text translation through online Daoist translation.) ##Download a cat in Python        http://placekitten.com/ , this website is a customized site for M ...

The goal of reference enhancement is to add some new methods and properties to the target class. Take the Waiter class as an example. Now you want to add a manage() method in the Management interface to it without modifying the code of the Waiter class. 1. Classes to enhance package com.test.springadvicetype; import org.springframework.s ...

Builder pattern Builder mode is an object creation mode, which is used to create composite objects. When an object is composed of multiple objects, and the combination may change greatly, the construction of sub objects and the combination of sub objects can be encapsulated by using builder mode. Her ...

In this article, we first talk about the function of each part of the code in the previous article, then add the code to store data in the database in the SqlBlueprintFunctionLibrary class, and introduce how to add comments and expose them to the blueprint.   1. CAPI is a packaged third-party libr ...

clone protected Object clone() Creates and returns a copy of this object. protected Object clone() throws CloneNotSupportedException All classes inherit Object, so all classes have clone() methods. But not all classes want to be cloned. They must support the clonable interface. This interface does ...

Write in front: Recently, I have been reviewing the previous content and learning algorithms, so I did not continue to learn new knowledge, so I stopped for a longer period of time and formally returned to learn new knowledge from today! Filter: Filter Concepts: Life's filters: water purifiers, a ...