anaconda python 3 6

...1.In syntax, the return of a tuple can omit parentheses, and multiple variables can receive a tuple at the same time, assigned to the corresponding value by location,So, the Python function returns a multivalued value that actually returns a tuple, but it's easier to write.2.Defining default parameters Keep in mind that the default parameter must point to the immutable object!3.

return TrueTen Else: return False12 def reduce_func (Li, Lis): return Li + Lis15 Li = [1,2,3,4,5]map_l = Map (Map_func, Li) #将li中所有的数都 +1filter_l = Filter (Filter_func, Li) #得到li中能被2整除的reduce_l = reduce (Reduce_func, Li) #1 +2+3+4+521stPrint map_lPrint filter_lPrint reduce_lThe results of the operation are as follows:C:\>python test1.py[2,

　　The first day of Python learningWrite this blog to motivate yourself and share your experiences and issues with others.First, class notes1.Python 3.0 and Python 2.0 incompatible Python 2.6 and Python 2.7 are excessive versions of Python2. The installation of

The unit collects many questionnaires in Word format, and the leader needs to collect the form's Information, I put all the questionnaires in a file, wrote a Python applet to print out the required information, this small program can be from Analyze information and extract information in python text #coding: Utf-8 import osimport win32comfrom win32com.client import Dispatch, Constantsfrom docx import Docum

running the Func () functionreturnFunc (*args, * *kw)returnWrapper@log#equivalent to execute now = log (now)defNow ():#calling Now () will execute the wrapper () function returned in the log () functionPrint '2013-12-25* * Case 2 (decorator with parameters, three levels of nesting):ImportFunctoolsdefLog (text):#First Level nestingdefDecorator (func):#Second Level nesting@functools. Wraps (func)defWrapper (*args, **kw):#Third Layer NestingPrint '%s%s ():'% (text, func.)__name__)#print a row of l

(' * ', 2) meaning right to left has been divided into the 2nd * symbol [' admin ', ' Armin ', ' guest ']Length: The length in Python3 is calculated according to the number of characters. Python2 Chinese is calculated by 2 characters.name = ' Armin ' V = len (name) print (V) can see a length of 5. Interactive mode len (variable name) to see the length.Index: Used to remove a specific valueName = "Armin" V = name[1] Print (v) is R. The code means that the value of position 1 is taken out of the

Python learning 3: List, tuples, and python learning list1. List: 1. How to define a list: list1 = [1,2,3,4,"hello","world"] As shown above, list1 is a list. The content of the list is enclosed in brackets. print(list1[2]) The value is calculated using the following table. The following table starts from 0, returns the subscript numbered 2, and the obtained value

to install: Anaconda Anaconda is currently the best Python auto complement and syntax prompt plugin in Sublime 3, and provides features such as "Jump to Definition", "Find Use", "Show Document", "Auto Rename", and so on. Djaneiro Provides support for Django. Sidebarenhancements Provides enhanced functionality fo

() is the return list in P2, which copies a copy of the memory, P3 in the generator, does not replicate within the P2 can be used D.iteritems ()6. Dictionary RestrictionsThe key of the dictionary cannot be duplicated, and can be hash, unordered7. Default DictionaryFrom collections Import DefaultdictD1 = defaultdict (list) #default初始化时, need to pass in a function, this function is also called the factory function, when we access the key by subscript d

A python conditional statement determines which block of code is executed by judging the execution result of one or more conditional statements.The IF statement in Python is used for control program execution in the basic form:If judging condition:Execute statement ...ElseExecute statement ...#coding =utf8A = 2If a > 0:print ' A greater than 0 'Elseprint ' A is less than 0 'The judgment condition of the IF

the value of key is the set typec['a'].add (1) c['a'].add (2) c['a'].add (2) c['b'].add (4)Print('the value of key is a dictionary of the list type:', D)Print('the value of key is a dictionary of the set type:'C>>> ================================ RESTART ================================>>>the value of key is a dictionary of list type: Defaultdict (class 'List', {'b': [4],'a': [1, 2, 2]}) The value of key is a dictionary of the set type: Defaultdict (class 'Set', {'b': {4},'a': {1, 2}})>>>One t

([[368], [[+], [], [ 387], [389, 390]]) Pts4 = Np.float32 ([ 0, 0], [+, 0], [0, +], [+]]) m_perspective = Cv2.getperspectivetransform (Pts3, pts4) img_perspective = Cv2.warpperspective (img, m_perspective, ( cols, rows))Print ' shift:\n ', M_shiftPrint ' rotate:\n ', M_rotatePrint ' affine:\n ', M_affinePrint ' perspective:\n ', M_perspectiveplt.subplot (231), Plt.imshow (IMG), Plt.title (' src ') Plt.subplot (232), Plt.imshow (res), Plt.title (' scale ') Plt.subplot (233), Plt.imshow (Img_shif

Put together the code, and gradually add: Import OS #1.os.getcwd() #获取当前目录 print os.getcwd() #示例 print os.getcwd()+‘\\resources\\baidu.txt‘ #获取当前目录下的resources文件夹下的baidu.txt文件 print ‘----当前目录.形式：‘,os.curdir #返回当前目录（‘.‘) #2.os.listdir(dirname) #列出dirname下的目录和文件 print ‘----当前目录下所有文件：‘,os.listdir(os.getcwd())#相当于在os.getcwd()目录下执行dir命令，返回为list

Description1. Import three modules, Urllib.request.urlopen is used to open the URL link, urllib.parse the UrlEncode method to convert the data object in the browser network to the second parameter of Urlopen data,json.loads () method to convert the string returned by Response.read to JSON format.2. The data object is all the attributes in the bottom formdata of the headers in the translate from the review element's network.3. The data in Urlopen (Url,

1. Q: Briefly describe the relationship between Unicode and utf-8 in Python? What are the commonly used functions? A: Unicode is a set of character encodings that define a unique encoding for each character; Utf-8 is an implementation of Unicode that uses variable-length encoding to store characters; commonly used functions:1) Decode: implementation of conversion from other encodings to Unicode encoding2) Encode: Enables conversion from Unicode to oth

, True, color_red)TextRectObj = textSurfaceObj. get_rect ()Pygame. display. update () If _ name _ = '_ main __':Main () 3. Key knowledge points: Sound processing uses the pygame. mixer. music module, which provides a wide range of methods, as follows: [Plain]Pygame. mixer. music. loadNotes: loading music filesPrototype: pygame. mixer. music. load (filename): return NonePygame. mixer. music. playViews: plays music.Prototype: pygame. mixer. music. play

are matchedPrint (Re.findall ("A.C", "123131asc,ssf\nafaa-c", re. Dotall))? Match 0 or one, there must match, if not also canPrint (Re.findall (' ab? ', "AA Ssafsfaabbssa"))* Match 0 or infinity + match one or infinity {n,m}print (Re.findall (' \d+. \d+ '). * Greedy match, select the most valuePrint (Re.findall ("A.*c", ' assfafasfcssssfafsfsf111223c '))Match to assfafasfcssssfafsfsf111223c.A non-greedy match that matches the value of a compound that is less earlyPrint (Re.findall ("A.C ", ' as

Ashamed, this topic is to refer to other people's blog made out, the main difficulty in1. How to get a zip file2.comments is a thing, the original author also in the blog "What the hell is the comments?"From this problem, I find that1. The information is not necessarily only on this page, you can modify the URL to obtain additional information.2. For information that you cannot understand in the tip, such as "comments" in the subject, you can try searching in the

factors other than the data set.2) orthogonal between the main components, can eliminate the interaction between the original data components of the factors.3) Calculation method is simple, the main operation is eigenvalue decomposition, easy to achieve.The main drawbacks of PCA algorithms are:1) The meaning of each characteristic dimension of principal component has certain fuzziness, which is not better than the interpretation of original sample ch

Familiar with Python (3) and familiar with python String is a topic center. ID of a string In many cases, we need to perform operations on each character in the string (see the following content for details). To perform operations accurately, we must perform the task of numbering the characters. For example, if there are 50 students in a class and all of these st