Python

Python function 1.1 function definitionfunction is derived from mathematics, but the concept of "function" in programming is very different from the function in mathematics, the specific difference, we will say later, the function of programming in

I. Regular Expressions-Introductory article1. Meta-characters, and common examples. Matches any character except the Terminator, and in some cases does not match the line start character^ Start of matching line^the matches the line that preceded the$

I've been exposed to reptile knowledge before, but in general it's best to use Python because Python has a lot of libraries for data collection,In addition, the language of Python is more concise and easy to read, in the process of acquisition,

First, the function requires the Login interface applet (the functions to be implemented are as follows) 1, enter the user name and password 2, after successful authentication display welcome Information 3, the wrong three times after locking two,

I saw this shell interview question before: get a list of 51CTO blogs sorted in reverse chronological order http://oldboy.blog.51cto.com/2561410/1860985Since I've been learning python for a while, think about using Python to solve problems.Idea:

1. Determine if the characters entered are consistent ""size= "Hello" char=input ("Input character name:") if char = = Size:print ("character name%s"%char, "equals", size) else:print ("Please enter character", size)2. Determine login authentication

Format characterThe format character reserves the location for the real value and controls the format of the display. A format character can contain a type code that controls the type of display, as follows:%s string (shown with STR ())%r string

Module:(1) URL Manager: Manage URLs(2) Web Downloader (urllib2): Download the Web page specified by the URL you want to crawl as a string(3) Web Interpreter (BeautifulSoup): parsingWays to download Web pages using URLLIB2:Method

variable Parameters *args allows you to pass in 0 or any of these parameters, which are automatically assembled as a tuple when the function is called.The keyword parameter , **kw , allows you to pass in 0 or any parameter with parameter names

Tag: User if statement int login is consistent input character div size1. Determine if the characters entered are consistentsize= "Hello" char=input ("Input character name:") if char = = SIZE: print ("character name%s"%char, "equals", size) Else:

Locust--scalable User Load Testing tool writen in Python (is a python-written, scale-up, extensible test performance tools)The environmental conditions required to install Locustio are: python2.6+, but Python3 is not supported.Today in CMD run pip

SCP vs SFTPThrough Paramiko can also transfer files, how to transfer files between computers through Paramiko, by reading official documents, found in the following two ways:Sftp=Paramiko.Sftpclient.From_transport(Ssh.get_transport ()) Span class=

Read Excel1. Import ModuleImport xlrd2. Open Excel file to read datadata = Xlrd.open_workbook (' Excel.xls ')3. Get a Worksheet①table = data.sheets () [0] #通过索引顺序获取②table = Data.sheet_by_index (0) #通过索引顺序获取③table = data.sheet_by_name (U ' Sheet1 ') #

English documents:iter(object[, Sentinel]) Return aniteratorObject. The first argument is interpreted very differently depending on the presence of the second argument. Without a second argument,ObjectMust be a collection object which supports the

A built-in functionThe return values for Bin (), Oct (), and Hex () are all strings, with 0b, 0o, and 0x prefixes respectively.Instance statistics number of 1 in binary numberdef countbits (n): return Bin (n). Count ("1") countbits (4)Two

Original link: http://www.datastudy.cc/to/64Most of the time, we get the report data, the decimal is a string with a percent semicolon, can not be directly computed, it needs to be converted, and then output.Workaround:From pandas import

1 #!/usr/bin/env python2 #Encoding:utf-83 Import Time4 ImportOS5 6Nowtime = Time.strftime ('%y-%m-%d%h:%m:%s')7Shopping_total_money =08Shopping_car = {}9 Ten One defTouch_shopping_log (): AWith open ('Shopping_log.txt','W') as Shopping_log: -

English documents: ID (object) Return the "Identity" of an object. This was an integer which was guaranteed to being unique and constant for the this object during its lifetime. The objects with non-overlapping lifetimes could have the Sameid ()

Flask + celery + gunicorn + gevent + nginx + supervisord to develop and deploy the business system. flaskgunicorn I have been using flask for a short time. I used flask to complete the background services of our Android client (providing REST APIs ),

Python Study Notes 2-functools.wraps decorators, functools. wraps Wraps has no practical application, but is used to solve the problem that the attribute of the function pointed to by the original function name caused by the decorator changes. The