Python

I. OverviewThe reduce operation is one of the most important techniques in functional programming, and its role is to generate a value from the operation of a set. For example, the most common summation, the maximum value, the minimum value, etc.

Scripting Features: Monitor CPU Usage Monitor Memory usage Monitor network traffic #!/usr/bin/env  python# --*-- coding:utf-8 --*--import  sysimport   tabimport  reimport  osimport  timefrom docker  import

The common function of Python intrinsics and closures is that they are passed to the function as arguments, except that the return is different from the invocation.1. Python intrinsic functionExample Python intrinsics:def test (*args): def Add

A function is equivalent to a function block, and when it is to be used, it can be called directly, avoiding the base code.function definition and use:1 #function2 defMail ():#Defining Functions3n = 123#function Body4n + = 15 Print(n)6Mail

Seven, the dictionaryA python dictionary is a variable-length hash table.Has_key whether the query has this key value.Add as long as you assign a value to a new key.Delete one with Del, delete all with clearchanging or adding new elements can be

Class: Simply a collection of functions in which you define a number of functions; Method: These are actually the functions you define. Object: In simple terms, it is a variable that has multiple attributes (or sub-variables). In the

Directory Python Exception Handling Python Standard exception Exception handling Use except without any exception type Using except with multiple exception types try-finally statements Exception parameters

The Yum library is not available after the Python 2.7 upgrade python3.4. Error:[ Email protected] Desktop]# Yum upgrade File "/usr/bin/yum", line except Keyboardinterrupt, e: [[email protected] Desktop]# Vim/usr/bin/yum #将!/usr/bin/python can be

Modules used threading, Optparse, URLLIB2Local need to put a dictionary, the name should be capitalized.On the Code1 defrequest (Url,pathname):2 Try:3 ImportUrllib24page ='/ http'+url+'/'+PathName5Request =Urllib2. Request

PyQt good, just be careful, this thing is GPL, if you want to write commercial program need to purchase license for commercial edition.In addition PYGTK, Wxpython are good GUI library.Python comes with a tkinter-based GUI library, which is the only

special members of the class 1. __doc__ represents the description of a class Class Foo: "" describes the classes information, which is used to see the Magic "" " def func (self): passprint foo.__doc__============== describes the

Client Programming:The first thing to do is to create a socket, using the socket function in the socket template in Python.Import sockets = Socket.socket (socket.af_inet,socket. SOCK_STREAM)There are two parameters behind the socket function:Address

Python basics chapter 4th-dictionary and python basics chapter 4th 1. mapping: The data structure that references values by name. The dictionary is the only built-in ing type in Python. The values in the dictionary do not have any special order, but

Python SQL database simple encapsulation of addition, deletion, modification, and query operations, pythonsql The examples in this article share with you how to use Python to encapsulate the addition, deletion, modification, and query of databases

Python format output (color), python format Introduction: If you want to display the output color in Python, it is quite easy to implement. You need termcolor knowledge! Reference: https://pypi.python.org/pypi/termcolor/1.1.0 Enable: Shell> pip

Flask developed restful api series (3) and flaskrestful The above two chapters mainly focus on basic configurations. Today we are doing something interesting and adding an avatar image to each customer. If we store images on our own servers, we have

[Python Data Analysis] Python3 multi-thread concurrent web crawler-taking Douban library Top250 as an example, python3top250 Based on the work of the last two articles [Python Data Analysis] Python3 Excel operation-Take Douban library Top250 as an

Python time stamp and formatting time conversion implementation code, python In python, time-related modules mainly include time and datetime. If you want to obtain the current system timestamp: time. time (), it is a float data type.Obtain the

Python development environment in Eclipse is a simple tutorial, eclipsepython I. background Eclipse is a Java-based scalable development platform. Its official downloads include J2EE, Java, C/C ++, and mobile application versions. In addition,

Use Python to implement the Fibonacci function, pythonfibonacci The onacci Fibonacci series is simple. It is a recursion. It may be used to learn any programming language. Recently, I was playing Python. After reading Learning Python and Core Python,