Python

List extend () How to use Extend () Use methodAs with the general function call format, the variable name. Method Name (parameter) The Extend method can append another sequence that contains more than one value at the end of the list, while the

Python has a logging module to facilitate the recording of program action logs, this article is a simple example of the use of the logging module: First introduce logging: Import xlrdImport MySQLdbImport OSImport logging First initialize the

A colleague of the company, when writing the shell, raised such a requirement that the SAR output would idle the column output and would require a different platform. In Linux, the $NF column is printed through awk ilde column, assuming that under

Get The returned page with the user-agent information , otherwise it will throw an "HTTP Error 403:forbidden" Exception .Because some websites to prevent this kind of access without user-agent information, will verify the request information in the

often see the WITH statement in Python code, carefully analyzed, you will find that the WITH statement is strong, can automatically close the resources. This is called context Manager in Python. So how do we use it, and when to use it. Here we'll

Python Paramiko Module installation and use of the detailedHttp://www.111cn.net/phper/python/67973.htmwget http://ftp.dlitz.net/pub/dlitz/crypto/pycrypto/pycrypto-2.6.tar.gzTAR-ZXVF pycrypto-2.6.tar.gzCD pycrypto-2.6/python setup.py buildpython

Takes two stepsIn order to extract the time from the string and compare it, so with this problem, how to convert the string to a datetime type1. Conversion of string to time type>>> Import Time>>> timestr = "time2009-12-14">>> t = time.strptime

"Martial arts Supreme, blades Slaughter Dragon, command the world, Mo dare not from, rely on the sky, who and the battle", this is the artifact. However, the python in today's "artifact" is not so powerful, here to say "artifact" is actually the

Preface: The first two articles reproduced other people's wonderful article, I also summarize it!Recently started to use the PY, why?I want to do a text similarity matching program, the general idea is two documents, one is the question, one is the

Researched the solution of the Python development GUI desktop application, the research result records as follows:Easygui: Control is very simple, even a basic grid, list components are not, not suitable for commercial, even ordinary applications

In Python, the concept of variables is basically the same as the equation variables of the middle school algebra.For example, for an equation y=x*x  , it x is a variable. When, the result of the x=2 calculation is 4 , when x=5 , the computed result

Supervised learning, supervised learningUnsupervised learning, unsupervised learningCategory, Classificatreturn, regressiondimensionality reduction, dimensionality reductionCluster, clusteringeigenvector, feature vectorcompiler language, complied

A. List　1. Define a listname=["Tom", "Jerry", "a", "a", "Lose", "Me"2. IndexAs with the index of a string, the list index starts at 0.Print ("First element:%s"%name[0]) >> first element: TomPrint ("Last element:%s"%name[-1])>> last element: Me3.

1. Module Introduction2.time & DateTime Module3.random4.os5.sys6.shutil7.json&pickle8.shelve9.xml processing10.yaml processing11.configparser12.hashlib13.subprocess14.logging Module15.re Regular Expressions1. ModuleA module is a collection of code

>>> class CObj (object):... pass...>>> dir ()['cobj', ' __builtins__ ', ' __doc__ ', ' __loader__ ', ' __name__ ', ' __package__ ', ' __spec__ ']>>> COB = CObj>>> dir ()[' CObj ', ' __builtins__ ', ' __doc__ ', ' __loader__ ', ' __name__ ', '

JSON is actually a string representation of a Python dictionary, but a dictionary cannot be passed directly as a complex object, so it needs to be converted to a string. The process of conversion is also a serialization process. Serialize to JSON

Speaking of the time in the computer, there are some more interesting things, such as we often hear the Unix timestamp, UTC time, GMT, and so on, from the expression they basically belong to the same thing, Because their time is said to be from 1970.

There are many ways to do this, and here are three ways to write: Writing one: #!/bin/bashwhile Read Linedoecho $linedone Two: #!/bin/bashcat filename (file to read) | While read Linedoecho $linedone Three: For line in ' cat filename (file to be

Recently took over more and more things, release and operation of the work is quite mechanical, coupled with the frequency is quite high, resulting in time wasted or a lot of advantages. Fix bugs What, test, submit repository (2 minutes), SSH to

Goal:1. Pass in 3 parameters: source file path, destination file path, MD5 file2. Every Monday to achieve full-scale backup, the rest of the time incremental backup1. Get all directories and files under the path (recursive) through the path passed