text sentiment analysis python

. However, this format has a flaw, that is, its storage efficiency is not very high, because the CSV and other plain text format contains a large number of whitespace characters, and later invented some file formats, such as ZIP, bZIP and gzip, the compression rate has been significantly improved.Import NumPy asNpimport Pandas asPD fromtempfile Import Namedtemporaryfile fromos.path Import getsizenp.random.seed ( the) A=NP.RANDOM.RANDN (365,4) Tmpf=nam

Python pickle module usage Example Analysis This example describes how to use the Python pickle module. Share it with you for your reference. The specific analysis is as follows: Pickle provides a simple persistence function. Objects can be stored on disks as files. Pickle. dump (obj, file [, protocol]) Serialize the

This paper makes a deep analysis of the common modules of Python crawler, and explains them in detail with examples. Share for everyone to use for reference. The specific analysis is as follows: Creepy module A Taiwan great God developed, the function is simple, can automatically crawl a website of all content, of course, you can also set which URLs need to cat

This example describes the Python pickle module usage. Share to everyone for your reference. The specific analysis is as follows: The pickle provides a simple persistence feature. You can store the object as a file on disk. Pickle.dump (obj, file[, Protocol]) Serializes the object and writes the resulting data stream to the file object. The parameter protocol is a serialization mode with a default value of

This example describes the use of Python pickle modules. Share to everyone for your reference. The specific analysis is as follows: Pickle provides a simple persistence function. objects can be stored on disk as files. Pickle.dump (obj, file[, Protocol]) Serializes the object and writes the resulting data stream to the file object. Parameter protocol is a serialization mode with a default value of 0, whi

novels to carry out analysis, may find very interesting laws.Chinese participle is actually a very interesting thing, especially the exploration of these martial arts novels! I am also a fan of martial arts, super like Jin Yong's novels. Snow Sky Shoot White Deer laugh book The Spirit of the Blue Yuan , each book is very classic. In addition to the above two dimensions, we also have a character analysis of

This article is mainly about go, from the perspective of comparative analysis of language. The reason why I chose to compare with Python and Erlang is that it is a high-level language, they have a large similarity in language characteristics, but the main reason is that I am more familiar with them.Many of the language features of Go are drawn from its three ancestors: C,pascal and CSP. Go's grammar, data t

Strings provide a series of methods to implement complex text processing tasks. A method is a function that is associated with a particular object. The method call performed two operations at the same time:First time: Property read-An expression with the Object.attribute format can be interpreted as "reading the value of the property attribute of an object";Second time: The function call expression--an expression with a function (parameter) format mea

This example describes the Python smallseg participle usage. Share to everyone for your reference. The specific analysis is as follows: #encoding =utf-8 #import Psyco #psyco. Full () words = [X.rstrip () for X in open ("Main.dic", mode= ' R ', encoding= ' Utf-8 ')] from SMALLSEG Import SEG seg = SEG () print (' Load dict ... ') seg.set (words) print ("Dict is OK.") def cuttest (

This article mainly introduces the usage of the enumerate function in python, and analyzes in detail the functions, definitions, and usage skills of the enumerate function in the form of instances, for more information about how to use the enumerate function in python, see the following example. Share it with you for your reference. The specific analysis is as fo

functions of read_csv and read_table are as follows:Read a text file by blockWhen working with very large files, or finding the set of parameters in a large file for subsequent processing, you only need to read a small part of the file or iterate over the file by block.Reading a few lines requires setting the nrows parameter, where the nrows subscript is starting from 0. So nrows=2 represents the first 3 lines. in [+]: result=pd.read_csv ('/home/zhf/

[Python Data Analysis] solve and optimize some problems in Python3 Excel (2), pythonpython3 After the previous article titled "Python Data Analysis" and "Excel in Python3"-taking Douban book Top250 as an example to crawl the top P250 of Douban books, some problems have not been solved, so we have further discussions, t

. txt", "a")For I in range (10):Word, count=items[i]Word = str (word)Count = Str (count)Fo.write (Word)Fo.write (")"Fo.write (count)Fo.write (' \ n ')Print (Word, count)Print (items)Fo.close () Here we will import the data into the three-person appearance number. txt this file. Draw a bubble chart from the data Summarize It can be said that "Caocao", "Hung Ming" "Liu Bei" is the most people, these are just simple data analysis, as the beginning

(SYS) #重新加载sysSys.setdefaultencoding (' Utf-8 ') #看你的编码需要utf-8 or gb2312Why do I have to reload the SYS module first when I call setdefaultencoding? Because the import statement here is actually not SYS's first import statement, that is, this may be the second to third time the Sys module imports, here is only a reference to the SYS, only reload can be reloaded; then why Reload? Instead of calling the function directly? Because the setdefaultencoding function is deleted after being called by th

In this paper, the method of realizing the algorithm of the Markov chain by Python is described. Share to everyone for your reference. The specific analysis is as follows: In the "Programming Practice" (English name "The Practice of Programming") of the book, the third chapter of the C language, C++,awk and Perl respectively, the implementation of the MA-fu chain algorithm, to enter through the

=[' ,' ,' ,' ,' ,' ,' ,' ,' ,' ,' ,' ,' ,' ,' ,' ,' ,' ,' ,' \ r ','\ n',' .*?; ',' ','#.*?;',' ,' ]Try: forSubstringinch[Re.Compile(String, Re.) S forStringinchSublist]: Content=Re.sub (SUBSTRING,"", content). Strip ()except:Raise Exception(' Error ' + Str(Substring.pattern))returnContent# only part of the code is shown here # Full code uploaded to GitHubOnly part of the code is shown here, and the full code is uploaded to GitHub4. Configuration sectionsetting.pyThis part of the reason

Idle to be prepared to write a crawler to crawl their own QQ space of all said say and pictures-. -First prepare to work, enter the mobile phone version of QQ space, Analysis page:We found that the mobile version of the paging mode is to use the Waterfall Flow page (see more), rather than the traditional paging mode, so we need to analyze the click "View More" when the request sent:As you can see, the xhr in the red box above is the one that was sent

this statement is to import all modules under the Graphics.primitive package into the current namespace. However, because of the different file name rules between different platforms (such as case sensitive issues), Python does not correctly determine which modules are to be imported. This statement only runs sequentially The init. py file under the Graphics and Primitive folders. To resolve this issue, you should define a list of the name all in ini

file.The following statement is ambiguous:fromimportThe original intent of this statement is to import all modules under the Graphics.primitive package into the current namespace. However, because the file name rules vary between platforms (for example, uppercase and lowercase sensitive issues), Python does not correctly determine which modules are to be imported. This statement simply executes the init. py file under the Graphics and Primitive folde

+1UnboundLocalError: local variable 'a' referenced before assignment >>> def foo(): a = [1] def bar(): a[0] = a[0] + 1 return a[0] return bar() >>> foo()2 Using closures to experience functional programming is good. Parentheses are missing in the original text, otherwise the returned function itself will be boring. Let's talk about this magical phenomenon. it's okay to change it to a container