Python

pdb/ipdb modules /pdb/ipdb moduleThe main role of PDB and IPDB is for single-step debugging of Python programs, and Python debugging can refer to links.Here is a simple example of using1 Import ipdb 2 3 i = 0 4 while i: 5 Print (i) 6

1, statistical system remaining memory.2, according to the existing MAC address, write a MAC address 1 larger than the previous MAC address.1, Statistics system remaining memory (Linux for example)#!/usr/bin/env python#-*-coding:utf-8-*-with open ('/

Python detection variable name 变量在编程中的用途非常广，在python中，变量的名称只能以字母或者下划线“_”开头，变量名只能由字母、数字、下划线组成。 编写python，使得其实现以下功能： 1、输入一个变量名； 2、当变量名首位不是字母或者下划线时，自动输出“该变量名不合适！”； 3、当变量名中有除了字母、数字和下划线以外的其他符号时，自动输出“该变量名不合适！”； 4、当变量名使用规范时，输出“该变量名可用”。

Before starting the Python basics, install the environment first. The following process is done under the Linux operating system, root user, mainly installs the 2.7 version of Python, and the Pip, Ipython, virtualenv and other tools, and finally Vim'

Below, we've got a friend class that inherits from the contact class.classcontactlist (list):defSearch (self, name):" "Return All contacts this contain the search value in their name." "matching_contacts= [] forContactinchSelf

1. Error handlingUse try except finallyTry : = 10/0except zerodivisionerror, E: print"zerodivisionerror ", Efinally: print"finally "or modulo by zerofinallyError type (with

Why use an adorner?Sometimes write a piece of code, over a period of time need to upgrade it, add some new features, but if you want to directly modify the original code will affect other people's call, so you need a not to modify the source code

class Int (object)| Int (x=0), integer| int (x, base=10), integer|| Convert a number or string to an integer, or return 0 if no arguments| is given. If x is a number, return x.__int__ (). For floating point| Numbers, this truncates towards zero.| If

With open ("ab.txt","R") as M:#forI in M : ## print iprint m.readline () +"Yes"# regardless of the handle ReadLine, the handle readlines,for the handle, including the newline character. Print# #print m.readlines ()Python traverses the file handle,

Initial knowledge of data typesDigital 2 is an example of an integer. Long integers are just larger integers. 3.23 and 52.3E-4 are examples of floating-point numbers. The e tag represents a power of 10.

One,% string formatting1,%s can accept any parameter using the corresponding input string after%s one by onePrint ("I am%s hobby is Zhangsan"% ' Lishi ')Print ("I am%s hobby is%s"% (' Lishi ', ' Zhangsan '))I am Lishi Hobby is ZhangsanI am Lishi

# Python website: http://www.python.org/# tuple is identified with () identifier, list with [] identifier, dictionary with {}# unless there is a special need for input, you should try to use the Raw_input function as much as possible# Change

Simple data types and assignmentsVariables do not need to be declaredPython variables do not need to be declared, you can enter directly:>>> A = 10Then your memory has a variable a, its value is 10, and its type is an integer (integer). You don't

1. The numeric types are divided into int, float and Complex,complex, and the related operations and types of int and float are converted as follows:>>> 59+1271>>> 59-1247>>> 2*1938>>> 2**532>>> 19/29.5>>> 19// 29>>> 19%21>>> 3*4.5-6 #自动类型转换7 .5>>>

Python command lineAssuming you have already installed Python, enter it on the Linux command line:$ pythonWill go directly to Python. Then at the command line prompt >>> later enter:>>>print (' Hello World ')You can see it and then output it on the

amqp==1.4.9anyjson==0.3.3apturl==0.5.2beautifulsoup4==4.4.1billiard==3.3.0.23blinker==1.3brlapi==0.6.4bs4==0.0.1celery==3.1.25celery-with-redis==3.0chardet==2.3.0checkbox-support==0.22command-not-found==0.3cryptography==1.2.3decorator==4.0.11defer==1

AsyncioThis module is a new feature added to version 3.4.Let's look at an example:Def a (): for x in range (3): print (' a.x ', x) def b (): For x in ' abc ': print (' b.x ', X) A () b () #运行结果: a.x 0a.x 1a . x 2b.x ab.x bb.x

1. Common python functionsABS Seek absolute valueAll determines whether all data in the iterator is true or the iterator data is empty, returns True, or returns falseAny to determine whether the data in the iterator is true, there is a return true,

question: How do I eliminate duplicate values while preserving the order of elements on a sequence?Answer: If the values on the sequence are all hashable types, it is easy to use the collection or generator to solve the problem.　　EG1:　　def dedupe

Requirements:Lists the dictionary corresponding node name, according to user input can add nodes, view nodes and other functions, where the address province-city-county as an alternative, this problem familiar with the dictionary nesting functionVim