python programming course hk

This article briefly introduces the concurrent programming implemented by Using generators in Python. Using the yield generator function for multi-process programming is an important part of Python's advanced learning, for more information, see concurrency (not parallel) programming. Currently, there are four methods:

▲ Object-oriented programming OOP Object oriented programming. OOP takes objects as the basic unit of a program, and an object contains functions for data and manipulating data. Process-oriented programming treats a computer program as a set of commands, which is the sequential execution of a set of functions. In order to simplify the program design, the process

This is a creation in Article, where the information may have evolved or changed. 0 basic situation, want to learn a language, learn python more appropriate, compared to many other mainstream programming language, have better readability, easy to get started, then how to quickly master Python? set goals: to do Python d

prove that he is not a fool '%self.name) def rent_house (self): print ('%s Black intermediary rent House , the idiot just rented it '%self.name ' b1=blackmedium (' million into place ', ' Huilongguan Tian Lu Yuan ')#检测是否含有某属性Printhasattr (B1, ' name ')) Print (Hasattr (B1, ' Sell_house '))#获取属性n =getattr (B1, ' name ') print (n) func=getattr (B1, ' Rent_house ') func () # GetAttr (B1, ' aaaaaaaa ') #报错 Print (GetAttr (B1, ' aaaaaaaa ', ' not Present '))#设置属性setattr (B1, ' SB ', True) SetAttr (B

I. Value Every date type in python is a type. Any data type in Python belongs to a certain type. For example, 3 belongs to the integer type, 3.14 belongs to the floating point type, and 'abc' belongs to the string type. # Use the type () function to view the variable type (3) #=> Ii. type check Python is a language with strong type check. For example, when

Python network programming-Analysis of Data Transmission UDP instances This article describes how to Implement UDP for data transmission in python network programming. Share it with you for your reference. The specific analysis is as follows: I. Problems: Do you think it is mysterious that tools like msn and qq on the

In our programming, some code is fixed, such as the code of the socket connection, read the code of the contents of the file, in general I would like to search the Internet and then paste it directly down to change, of course, if you can remember all the code that is more powerful, but their own writing after all is not as fast as pasting, And the code you write to test, and a test of code can be used multi

1.python Multi-threaded programming A process is made up of several threads, and a process has at least one thread. Because threads are the execution unit that is directly supported by the operating system, the high-level language is usually built into multi-threaded support, and Python is no exception, and Python thre

I. How to define a classBefore you go into Python-oriented programming, learn several terms: classes, class objects, instance objects, properties, functions, and methods.A class is a encapsulation of something in the real world, and defining a class can be defined in the following way:Class ClassName: block Note that there is a colon behind the class name, and you can define the properties and methods wi

Although Python is an explanatory language, it is object-oriented and can be programmed with objects.First, how to define a classBefore you go into Python-oriented programming, learn several terms: classes, class objects, instance objects, properties, functions, and methods.A class is a encapsulation of something in the real world, and defining a class can be def

1. Inheritance and derivationAs we have said above, everything in Python is object. We extract the common features and skills from the objects and get the concept of the class. There are also common characteristics between classes and classes, and we can extract common skills and features from classes that have common characteristics and skills, called parent classes.For example, teachers and students, have a name, age, birthday, gender and so on, wil

This article mainly introduces some notes when using closures in Python programming. The article is from the blog of felden, a well-known Python developer in China. If you need a friend, refer to the following to write this blog, how to use outer variable in inner method, which originated from the Tornado Contact Group, is of reference value to the answers from f

There are two ways to define a function in Python, one defined by the normal definition of Def, a function to specify a name, and the second to be defined with a lambda, without specifying a name, called a lambda function.Lambda function is also called anonymous function, anonymous function is no Name function, function does not have a name? Yes, of course. Some functions, if only temporary, and its busines

() # NameError: global name 'self 'is not defined # is the self field not added to say_name (self, name = None) not found) :... cat. say_name () # TypeError: say_name () takes at least 1 argument (0 given), the parameter is missing This indicates that staticmethod cannot use instance attributes and methods, and of course it cannot use classes. # Modify the code # first create an instance method, which uses the staticmethod @ staticmethoddef say_nam

there is a "distributed System" this book, if you are blocking calls, you will always put yourself "hang" until the book has no results, if the non-blocking call, you don't care if the boss has told you, you have to play the first side, Of course, you'll have to check the boss for a few minutes occasionally.Here the blocking is independent of the non-blocking and whether synchronous asynchronous. It has nothing to do with how the boss responds to you

Knowledge of preamble Theory: Python Concurrent Programming Multithreading (i) Introduction of a threading moduleThe multiprocess module completely imitates the interface of the threading module, which has a great similarity in the use level.Official website Link: https://docs.python.org/3/library/threading.html?highlight=threading# (loaded in B mode ...). ）Two ways to open a threadWay OneMode twoThr

o'clock, he says "get started" at nine o'clock, instead of saying to the salesperson: "Start a sales job," say to the technician, "Start technical work", because "employee" is an abstract thing, so long as the employee can start to work, He knows that. As for each employee, of course, they do their job and do their jobs.Polymorphism allows the object of a subclass to be used as an object of the parent class, a reference to a parent type to an object

What is epollepoll? In linux network programming, select is used for event triggering for a long time. In the new linux kernel, there is a mechanism to replace it, that is, ep what is epoll What is epoll? In linux network programming, select is used for event triggering for a long time. In the new linux kernel, there is a mechanism to replace it, that is, epoll. Of cour