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Python orchestration & asyncio & asynchronous programming 1. Cooperation The coroutine is a kind of micro thread, and it is a kind of context switching technology of user state. Through a thread, code blocks can be switched to each other for execution There are several ways to implement a collaboration: greenlet, early modules yield ke ...

In recent days, the examination of reviewing data structure is also a process of checking the defects and making up the omissions, so write down the handwritten code. In addition, the problem that it's better not to duplicate the name of the actual participating parameter in c/c + + class has puzzled and drunk for a lon ...

Recently, official account official has been merged into one public official account for the company's business needs, that is to say, one official account (mainly fans) should be transferred to another public number. Two According to WeChat specification, the openid of the same user in different official account is different. Our business syst ...

Python variables Variables are used to store some intermediate results in the computation of programs. In order to facilitate future calls, variables must be descriptive. Variable can be regarded as a container for information, marked and stored in memory, which can be used in the whole program. student_number=30 studentNumber=30 ...

CTF Web - [geek challenge 2019]PHP Blog description The information involved in this article comes from Internet collation and personal summary, which means personal learning and experience summary. If there is any infringement, please contact me to delete, thank you! This article is only for learning and communication, not for illegal use! C ...

##Closure: internal function, calling variables outside the scope of other functions def outer(): x=10 def inner(): print(x) return inner #outer()() f=outer() f() Here inner is a closure, closure = internal function + environment, and environment is x=10.Closures are used to explain the phenomenon of calling variables ...

Python generator Generators and build expressions a=[i*2 for i in range(10)] generate expressionb=(i*2 for i in range(10)) (generator) Features of generator: advantages (no memory space, fast generation speed), disadvantages (can't slice, can only save the current value, can't get the previous value) Python create generator #1.generator b=(i* ...

iterator Iteratable object: an iteratable object implements the iterator method, which returns an iterator object. Iterator: so what iterator? It is a stateful object, which can return the next value in the container when you call the next() method. Any object that implements the uiter UPU and unext UPU (implementing the next() method in py ...

[Python data structure] using Circular List to implement Queue 1. Queue Queues, also known as queue s, are first in first out linear tables. In practical application, it is usually realized by linked list or array. Queues can only be inserted at the back end (called rear) and deleted at the front end. The operation of queues is simil ...

Please indicate the source of Reprint: http://blog.csdn.net/l1028386804/article/details/78996095 This paper is based on< Python -- Python nmap installation and common method description >To build an efficient port scanner case, please read the blog first< Python -- Python nmap installation and common method description>， Here, we ...