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# hyperparameter Selection Loopscore_hist = []cvals = [0.001, 0.003, 0.006, 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.1]for C In Cvals: model. c = c = score = Cv_loop (Xt, y, model, N) score_hist.append ((score,c)) print "C:%f Mean AUC:%f"% (C, score) Best C = sorted (score_hist) [ -1][1]print "Best C Value:%f"% (BESTC)From KaggleCopyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced.Machine learning in

Stitching raw DATA:Train_data = pd.read_csv (' train.csv ') Test_data = pd.read_csv (' test.csv ') All_data = Np.vstack ((train_data.ix[:,1:-1], TEST_DATA.IX[:,1:-1]))Merge array Vstack and Hstack functions under NumPy:>>> a = Np.ones ((2,2)) >>> B = Np.eye (2) >>> print Np.vstack ((A, b)) [[1. 1.] [1. 1.] [1. 0.] [0. 1.]]>>> Print Np.hstack ((A, b)) [[1. 1. 1. 0.] [1. 1. 0. 1.]Generate a high (2) secondary feature:def group_data (data, degree=2, Hash=hash): new_data = [] m,n = D

(labels[:: -1]) Xgtrain = XGB. Dmatrix (Train[offset:,:], Label=labels[offset:]) Xgval = XGB. Dmatrix (Train[:offset,:], label=labels[:offset]) watchlist = [(Xgtrain, ' Train '), (Xgval, ' val ')]model = Xgb.train (plst , Xgtrain, Num_rounds, watchlist, early_stopping_rounds=120) preds2 = Model.predict (xgtest,ntree_limit=model.best_ Iteration) #combine Predictions#since the metric only cares on relative rank we don ' t need to Averagepreds = (PREDS1) * *. 4 + (PREDS2) *8.6return Preds(Code fro

If statementExample: User login verification, code as follows1 #Define user name password2user ='Tamir'3passwd ='Tamir123'4 5 #define user name password before user enters account password to authenticate6Username = input ("Username:")7Password = input ("Password:")8 9 #use the If statement to write user input validation informationTen ifuser =Username: One #Print ("username is correct ...") production environment is not recommended to verify that the account is correct, will increase secur

() #index中内容如果不存在, direct errorS.isdigit () #判断是否由数字组成S.alpha # LettersS.alnum # Numbers and lettersCalculating string Lengthss = ' Have you had a drink today? 'i = Len (s) #python的内置函数i = S._len_ () #也可求长度, the Len () function executes when it is actually executed.Using the While loop stringCount = 0While Count Print (S[count])Count + = 1To iterate through a string with a for loopFor C in S: #把s中每一个字符交给前面的for循环Print (c) #优势: Simple disadvantage: No

>>> a= "in">>> A' \xe4\xb8\xad '>>> B=a.decode ()Traceback (most recent):File "Unicodedecodeerror: ' ASCII ' codec can ' t decode byte 0xe4 in position 0:ordinal not in range (128)>>> B=a.encode ("Utf-8")Traceback (most recent):File "Unicodedecodeerror: ' ASCII ' codec can ' t decode byte 0xe4 in position 0:ordinal not in range (128)>>> B=a.decode ("Utf-8")>>> bU ' \u4e2d '>>> a=u "in">>> AU ' \u4e2d 'How can I get out of Chinese characters?Python

Today's content:-------------------------------------------? Code indent with Colon? Blank line delimited Code snippet? Naming conventions for packages and modules? Naming conventions for classes, objects? Naming conventions for functions? Code commentsCode indent with colon:If num>5:Print (' yes ');ElsePrint (' no ');Blank line delimited code snippet:1.if2.while3.for4.def5.classNaming conventions for packages and modules:1. PackageRequirements are uniform in lowercase.2. ModuleRequirements are

Study C When carefully read the two books, a sense of epiphany, began to have a more profound understanding of C. Now that you're learning python, you've gone through the quick tutorials and the official manuals to write some simple programs. At present, the main flask is to look at the tutorial code, I plan to flask more familiar with the beginning to read flask source code, but feel only to see the codes may not be able to find the focus, so I want

‘xxx‘ encode(‘utf-8‘) method: (Unicode to Utf-8) >>> u " abc " . Encode ( " utf-8 Span style= "COLOR: #800000" > " ) " Span style= "COLOR: #800000" >abc " >>> u " Chinese ". Encode (" Utf-8 " ) ' 6. In turn, convert the string represented by the UTF-8 encoding ‘xxx‘ to a Unicode string u‘xxx‘ using the decode(‘utf-8‘) method: (Utf-8 converted to Unicode )>>>'ABC'. Decode ('Utf-8') U'ABC'>>>'\xe4\xb8\xad\xe6\x96\x87'. Decode ('Utf-8') U'\u4e2d\u6587'>>>Print '\xe4\xb8\xad\xe6\x9

subclass is also called Foo, there is nothing you can do about it. methods of class 13 The first argument must be self, and the first parameter of the static method must be CLS. Seven coding recommendations The 1 encoding takes into account the efficiency of other Python implementations, such as the high efficiency of the operator ' + ' in CPython (Python), whic

Coding Introduction:1. ASCII: English, special characters, numerals, 8bit, 1byte2. GBK: Chinese 16bit, 2byte. Compatible with ASCII3. Unicode: Universal code, 32bit 4byte. Compatible with ASCII4. UTF-8: variable-length Unicode. English: 8bit, Europe: 16bit, Chinese: 24bit 3bytePython2 can only be used in ASCIIPython3 has Unicode, the default encoding is UnicodeIn memory, Unicode is used. Hard drives and network transmissions are utf-8 or GBK.Python3 '

I am now studying codecademy, but I still want to choose a comprehensive paper-based book. Is there any recommended books? Thank you ~ I am now studying codecademy, but I still want to choose a comprehensive paper-based book. Is there any recommended books? Thank you ~ Reply: 9 free Python programming books I recommend 《 A Byte of PythonAs an entry-level

August 20, 2014 "Concise Python Programming" Core notes (note)Yesterday and today in two days time. The book "Concise Python Programming" is finished, including the code on the book. Now record the core notes so that we can review them later.The first chapter briefly introducesPython language is one of the few programm

PEP8 Coding Specification This blog is a translated version of PEP8https://my.oschina.net/u/1433482/blog/464444 Divided into 7 main parts It is important to keep the consistency of the code because it must read more code than write code during the development process. 1. Code layout Indent: Four spaces Multi-parameter hanging or vertical indentation in the method: Select line break in the IDE at the end of the

Tags: als Note Selection View python cep def Pytho CTIFirst of all, put the code here, and then have time to explain the problems in the program,This small program knowledge to implement the function, and there is not much to the layout of the pursuit ofSome comments are not deleted, and there is no function to wrap up, looking at the wholeIt should be a little messy.The following is the complete code,ImportTkinterImportPymysql fromTkinterImport* from

Php Chinese network (www.php.cn) provides the most comprehensive basic tutorial on programming technology, introducing HTML, CSS, Javascript, Python, Java, Ruby, C, PHP, basic knowledge of MySQL and other programming languages. At the same time, this site also provides a large number of online instances, through which you can better learn programming... Reply: I recommend Liao Xuefeng's Python tutorial. I a

The problem of Chinese coding is always a headache in Python programming, this paper summarizes it in detail. Specifically as follows:When the string is: ' \U4E2D\U56FD ' >>>s=[' \u4e2d\u56fd ', ' \u6e05\u534e\u5927\u5b66 '] >>>str=s[0].decode (' Unicode_escape ') # Encode ("Euc_kr") >>>print str China When the string is: ' An East Asian school group ' >>>print UNICHR (19996) East

Browser actions# coding: utf-8from selenium import webdriverfrom time import sleepdriver = webdriver.Firefox()driver.get("https://www.baidu.com")# 设置浏览器宽800，高400driver.set_window_size(800, 400)sleep(3)# 最大化窗口driver.maximize_window()driver.get("https://www.cnblogs.com/")sleep(3)# 后退到上一个页面driver.back()sleep(3)# 前进到下一个页面driver.forward()sleep(3)# 退出浏览器driver.quit()Object PositioningWebdriver provides a range of element positioning methods, which are commo

August 20, 2014 "Concise Python Programming" Core notes (note)Two days yesterday and today, the book "Concise Python Programming" is finished, including the code in the book. Now record the core notes so that we can review them later.Introduction to the first chapterPython language is one of the few programming languag

python crawler-beautiful soup-as book catalog (1) For the first time, use Python + beautiful soup to crawl some data and use it as a book catalog as an exercise. idea:-1. Get when the book Category: Class Report name + link URL Effect: Script Description:- 1. mylog.py: Log-