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Import NumPy as NPNp.arange (Dtype = float) #numpy中的arange与普通的range作用一样, range (start, stop, step)#arange可以通过dtype来指定创建的数组类型, arrays differ from tuples and lists, and the entire array must be of the same type.Np.linspace (Start, stop, number) #其中number指定了start到stop之间的个数 (contains both end point values)Of course, you can also generate random numbers to initialize an array.Np.random.rand (2, 4) #产生一个2行4列的array, Rand uses a uniform distribution between 0 and 1.NP.RANDOM.RANDN (2, 4) #产生一个2行4列的array
Create a crawler collection novel using Python,
Development Tool: python3.4Operating System: win8Main function: Specify the novel web page to crawl the novel directory, save it to the local location by chapter, and save the crawled web page to the local configuration file.Crawled Website: http://www.cishuge.com/Novel name: Liling night travelCode Source: Self-signed
Import urllib. requestimport http. cookie
#!/usr/bin/env pythonImport OS#导入功能模块url = "/tmp/"#变量定义def check ():#函数定义 whileTrue:#一直循环 prompt the user to enter the correct file name to createOs.system ("cd/tmp")d_com=raw_input ("please input filename")#将用户输入的值赋给变量做判断if os.path.exists (url+d_com) = = True:#调用功能模块判断文件是否存在print "error!! File had existed "#输出判断结果Continue#存在时重新输入文件名Else:While True:#当要创建的文件不存在M = open (url+d_com, ' a ')# Prompt the user to enter content into the created fileA = raw_input ("Piease input what ' s want Add") m.writ
In order to facilitate later work, today in ADT installed Pydev (http://pydev.org/updates), but after the installation, the new project was not found in pydev,perference.Immediately after trying to install a slightly lower version still does not work, meditation began to think about what was done to make Pydev unavailable.Finally I found out that the original requirements for the project, the JDK must be under the 1.7 version.Think of this reason speed installation JDK1.7, of course, environment
I have just learned to use Photoshop to make Python word effect, feel good, close-up down to share with you. Let's look at the effect chart first.
1, create a new file, set as shown.
2, we select the Text tool in the toolbar, and its font set to stencil std, font size is 110, color is black, and then enter text. Get the font as shown.
3, the deletion of the text, and c
ABC modules /ABC moduleIn defining an abstract method, Python provides an ABC module to detect whether an abstract method was redefined during the initialization phase.1 fromAbcImportAbcmeta, Abstractmethod2 3 #Generate a abstract base obj-myabc4 classMYABC (metaclass=Abcmeta):5 #__metaclass__ = Abcmeta6 @abstractmethod7 defRun (self):8 Pass9 Ten classFoo (MYABC): One defRun (self): A Print('Run') - -f =Foo () theF.run ()
Windows uses ' \ r \ n ', Linux uses ' \ n ' and Mac uses ' \ R '
Indicates the platform you are using:os.name for Windows, it is ' NT ', and for Linux/unix users, it's ' POSIX '
Renaming:os.rename (old, new)
To create a multilevel directory:os.makedirs (r "C:\python\test")
Create a single directory:os.mkdir ("test")
Get file properties:os.stat (file)
Modi
VS Code + Anaconda to create a comfortable Python environment
Recently has been using Anaconda to write code, but it is not easy to debug, and the other anaconda more biased towards data analysis, Python may be more biased towards the pychram, but my experience is pychram more cumbersome ... Start speed to catch up with MATLAB, so the use of experience is not ver
The main content of this paper is translated from Learn blockchains by Building oneThis article original link, reprint please indicate the source.The author thinks that the quickest way to learn a blockchain is to create one yourself, and this article follows the author using Python to create a blockchain.We are curious about the rise of digital money and want to
constructor __init__ is just a function, but it looks a little odd. Then, the operation in the function is still possible in the constructor. Like what:def __init__ (Self,*args):Pass
This type of argument: *args as described in the previous function arguments, it is not much to say. Forget the reader, please go to review. However, the self parameter is necessary because it is to create an instance object.
Many times, not every time you want to pass
Use Python to create your own Shell:part II[TOC]Original link and description
https://hackercollider.com/articles/2016/07/06/create-your-own-shell-in-python-part-2/
This translation document is originally selected from Linux China , the translation of documents copyright belongs to linux China all
In
1. Select the folder, right-click, and click New Python file2. After the name is good, the creation of the file is my life.3. After the file name is good, you can edit the codeSuch as:Nf=open ("Pi_digits.txt", "W")Nf.write ("3.14159265358979323846 ...")4. After the code is edited, you can click the right mouse button and click ' Run to create the file '5. Create
Python advanced ing--Create your first tornado appCategory: Python2013-06-02 23:02 1725 people read Comments (2) favorite reports PythontornadoEvery day in the group with a lot of friends to discuss some issues, feel that their technical upgrading has a great help, but also can brainstorm, learn some of their own previously never touched things, such as tornado, recently heard a lot of friends in the gr
Make vim a python development environment. The article uses pathogen + git to manage the Vim plug-in. Students who are not quite clear about this way can refer to the introduction of "3". Pathogen changed the original vim can only throw the plugin all to the. Vim directory operation mode, so that each plug-in can be a separate folder in the. Vim/bundle directory, add and remove plug-ins are very refreshing. With Git's powerful child module management
What if application a requires Jinja 2.7 and application B needs Jinja 2.6? You can create different virtual environments for different applications at this time.In this case, each app may need to have a "standalone" Python runtime environment. Virtualenv is a python run environment that is used to create a "quarantine
4-3 count to:Use a For loop to print the digital 1~20 (included)As follows:For numbers in range (1,21):(space) print (numbers)4-4 1 million: Create a list with numbers that contain 1~1000000, and then use a for loop to print the numbers.As follows:Numbers=[number for number in range (0,1000001)]For number in numbers:(space) print (number)4-5 Calculate the sum of the 1~1000000: Create a list that contains th
We need to start thinking about how to translate a collection of text into quantifiable things. The easiest way to do this is to consider word frequency.
I will try not to use NLTK and Scikits-learn packages. We first use Python to explain some basic concepts.
Basic frequency
First, let's review how to get the number of words in each document: a frequency vector.
#examples taken from here:http://stackoverflow.com/a/1750187
mydoclist = ['
Want to manually create a player that belongs to you, while practicing Python programming?If you want, then act now!Required librariesPygameTkinterMutagenAs for their use, you can browse through the documentation, if you want to do a more powerful player, then you must take a good look at Oh!Design ideasAs version 0, we do not want to do too complex projects. Here are just a few features:To display the MP3
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