Python

Because do not want to use URLLIB2, have not used splinter, today want to try, after all, the latter support more user-friendly features/automation.1, install splinterThe installation process is simple and the PIP is installed to execute:$ [sudo]

Python Learning record blog is I record learning python3 process of some records and processes, in the future can also help themselves review.Python Benefits:1.Python easy to get started, powerful, strong applicability;2. The development efficiency

It's nothing today. Practice Python's epoll and start by writing a client:#!/usr/pythonImportSOCKET,SYS,SELECTC=Socket.socket (Socket.af_inet,socket. SOCK_STREAM) Host='127.0.0.1'Port=57777C.connect ((host,port)) epoll_fd=Select.epoll ()

Python's dictionary is a very convenient data structure, using which we can easily find his grades, rankings, etc. by name (key) without having to traverse the entire dataset.For example: {' Lee ': [1, +], ' Jane ': [2, 98] ...}But in the process of

I. Basic concepts and use1. Data structure: A collection of elements that are organized in a way, such as numbering elements, that can be numbers or characters, or even other data structures. 2, Sequence: the most basic data structure Python

  learned some simple grammar rules today, not much to say, started:      II, data types                 The shaping and floating-point types in the common data type don't say much.                1, string                     strings are any text

Business Scenario:We often run monthly or weekly levels of reports.Week level of the report is also relatively OK, that is, seven days ago directly with Timedelta (days=7) to get the start date is OK;But the monthly level of the report will be

16. Class 　　A few things to note:I. If the newly created class does not inherit any other class, the default inherits the underlying class object (to write it out, this is a syntax rule);The variables in class II are divided into class

　　First, we have to make it clear that there is no interface type in Python, and defining an interface is just an artificial rule, self-constraining in the programming process A Python class can be written in any method. Define an

Singleton mode, also known as the list mode, is a common software design pattern. When you apply this pattern, the class of the Singleton object must guarantee that only one instance exists. Many times the entire system only needs to have a global

I'm going to use Python to aid in parsing the VLAN, Eth-trunk, and interface information in the router configuration, where the relationship between VLANs and interface, Eth-trunk, and interface needs to be reflected.There are many more structured

Python applications are now in full swing with a wide range of applications. Fast access to the top of the programming language rankings due to its rapid development and high efficiency. This series of articles is dedicated to a comprehensive and

Chapter IIIGet helpUse the built-in Help feature.ExHelp (STR)-Displays assistance for the Str class.Chapter Fourth Basic Concepts1. A literal constant: a value that always represents its own and cannot be changed.2. Number: integers, long integers,

Class Foo (object):def test (self): #这是实例方法Print (' object ')@classmethod # This is the class methoddef test2 (CLSS):Print (' class ')@staticmethod # This is a static methoddef test3 ():Print (' static ')#实例方法的访问方式Ff=foo ()Ff.test ()

#Coding=utf8 fromCollectionsImportIterator fromCollectionsImportiterable#Iterator ObjectclassOwniteror (Iterator):def __init__(self, arrs): Self.index=0 Self.arrs=ArrsdefNext (self):ifSelf.index > Len (self.arrs)-1:

fp = open ("Test.txt", W) opens a file directly and creates a file if the file does not existAbout open mode:W opens in write mode,A opens in Append mode (starting with EOF and creating a new file if necessary)R+ Open in read-write modew+ Open in

Variables and strings in PythonVariable:1. Variable naming rules: Letters, numbers, underscores, cannot start with a number2, the variable is assigned with the = number3, the reference of the variable directly using the variable name, no other with

Some examples of this article come from the second edition of >Subclasses automatically inherit the constructor of the parent class if they do not define a constructor method.The constructor of the parent class is automatically called when the child

First, the initial knowledge of Python object-oriented:Class Person: #使用class关键字定义一个类Age=0 #类变量 (static variable)Def eat (Self,food): #定义一个方法Self.age=5 #self是实例本身, Self.age is an instance variablePrint ("I'll eat%s"%food)Xiaofan=person () #实例化,

I have been working in the operation of the industry for nearly 10 years, I first contact Linux is in a sophomore appearance, then only the pursuit of easy to understand, so the choice of Ubuntu as a learning, use of the object, it is simple, easy,