create dataframe python

In web development, the back-end code is actually quite easy to write. For example, we write a rest API for creating a blog: @api @post ('/api/blogs ') def api_create_blog (): i = ctx.request.input (name= ", summary=", content= ") name = I.name.strip () summary = I.summary.strip () content = I.content.strip () If not name: raise Apivalueerror (' name ', ' name cannot be empty. ') If not summary: raise Apivalueerror (' summary ', ' summary cannot is empty. ') If not content: rai

Create process and pythoncreate process for python System ProgrammingI. forking process The process generated by fork has the following features: Is a process clone. The created process exists independently of the parent process. The thread is copied and executed when fork () is called. Returns 0 in the Child thread. Returns the pid of the subthread in the parent thread. The PID of the sub-t

SublimeText is a very powerful Text editor. The following describes how to create SublimeText3 as a PythonDjango development tool: 1. install Sublime Text 3. Although Sublime 3 is still in beta stage, it is very stable and the speed is improved compared with Sublime 2. sublime 3 can be downloaded and installed on the official website. although Sublime is free software, if you have sufficient financial capabilities, you can consider purchasing it to s

This article will share with you the Python code used to create a crawler to collect novels. it is very simple and practical. although it is still a bit flawed, you can change it together and make common progress in the development tool python3.4. Operating system: win8 Main function: specify the novel web page to crawl the novel Directory, save it to the local location by chapter, and save the crawled web

cylindrical cone ', ' xlconecolclustered ': ' Clustered column-shaped cone ', ' xlconecolstacked ': ' Stacked column cone ', ' xlConeColStacked100 ': ' percent stacked cylindrical cone ', ' xlcylinderbarclustered ': ' Clustered Bar-shaped column ', ' xlcylinderbarstacked ': ' Stacked bar cylinder ', ' xlCylinderBarStacked100 ': ' percent stacked bar cylinder ', ' Xlcylindercol ': ' Three-dimensional cylindrical cylinder ', ' xlcylindercolclustered ': ' Clustered column-shaped cone ', ' xlcylind

I wrote the test code for the fork process under Python (to illustrate this problem is not necessarily appropriate ): Def fork (a): def now (): import datetime return datetime. datetime. now (). strftime ("% S. % f ") import OS import time print now (), a if OS. fork () = 0: print 'sub-process [% s]: % s' % (now (), OS. getpid () while 1: a-= 10 print 'sub-process a value [% s]: % s' % (now (), a) if a TIPS: OS. fork () has two returned values: the r

* #consistent with parentnode.append (Element) Effect $NewNode = elementtree.subelement (node,'Activetype')Panax Notoginseng #Setting Properties -newnode.attrib['ID'] ='9' thenewnode.attrib[' Level'] =' -' +newnode.attrib['begin'] ='201401010000' Anewnode.attrib['End'] ='201401010000' the #Chinese need special decoding +newnode.attrib['Tip'] ='Test'. Decode ('Utf-8') - #symbol at the end of a node $Newnode.tail ='\ n' $ #node.append (N

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

1 #!/usr/bin/python2 #Coding=utf-83 fromTimeImportCtime,sleep4 ImportThreading5 6 classMythead (Threading. Thread):7 def __init__(self,func,args,name="'):8Super (Mythead,self).__init__()9Self.name=nameTenSelf.func=func Oneself.args=args A defRun (self): -Self.func (*Self.args) - the - - defplayer (filename,time): - forIinchRange (2): + Print "starting playing:%s%s"%(Filename,ctime ()) - Sleep (time) + Ad={'1.mp3': 4,'2.mp4'75A'3.mp3': 7} atL=[] - forFilename,timei

############################## #创建文件 ############################################!/usr/bin/envpython "" Makeatestfile ' Importosls=os.linesep#getfilenamefname =raw_input (' enterfilename: ') whiletrue:if Os.path.exists (fname): print (' error:%salready Exists ' %fname) exit () breakelse: Break#getfilecontent (Test) linesall=[]print ("enterlines ('. ') byitselftoquit) ") #loop untiluserterminatesinputwhiletrue: entry=raw_input (' > ') ifentry== '. ': breakelse: All.append (Entry) #write linesto

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 ()

With Pywin32, can you do whatever you like on Windows?Yes.#-*-coding:cp936-*-# import osimport pythoncomfrom Win32com.shell import shellfrom Win32com.shell import shellcondef Set_shortcut (filename,lnkname,iconname): #如无需特别设置图标, you can remove the iconname parameter shortcut = pythoncom. CoCreateInstance (Shell. Clsid_shelllink, None, pythoncom. Clsctx_inproc_server, Shell. Iid_ishelllink) shortcut. SetPath (filename) shortcut. Seticonlocation (iconname,0) #可有可无, does not use the default file

Create a tuple of PythonTuple is another ordered list, and Chinese is translated as "tuple". Tuple and list are very similar, however,once a tuple is created, it cannot be modified .The same is the name of the class, expressed as a tuple as follows:>>> t = (' Adam ', ' Lisa ', ' Bart ')The only difference between creating a tuple and creating a list is the ( ) substitution [ ] .Now, this t cannot be changed, thetuple has no append () method, and ther

The dictionary is the only built-in mapping type in Python. The values in the dictionary are not in a particular order, but are stored in a particular key. A key can be a number, a string, or even a tuple. 1. Creating and Using dictionaries Dictionaries can be created in the following ways: Copy Code code as follows: Phonebook = {' Alice ': ' 2341 ', ' Beth ': ' 9102 ', ' ceil ': ' 3258 '} A dictionary consists of multiple keys

what to add, the moment has not thought how to partition it ...) ）Microblog-app__init__.pyviews.py-static-templatsrun.pyInitialize app\__init__.py from Import Flask = Flask (__name__) fromimport views Writing an attempt to function # app\views.py from Import app @app. Route ('/') @app. Route ('/index ') def index (): Pass The final step to making the Web app fully operational is to create a script that launches the application Web serve

= 127.0.0.1conn = MySQLdb.connect (host = ' localhost ', port = 3306, user = ' root ', passwd = ' * * * * * ') Curs = Conn.cursor () # Create a database named Addtest#ensure the program can run Multiple times,we should use Try...exceptiontry:curs.execute (' Create Database addtest ') except:print ' database Addt EST exists! ' conn.select_db (' Addtest ') # Create