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A university with about 50 students in China, a major in Mathematics (allocation), has been downgraded to a level, and the professional content cannot keep up. It has the basis of art design, programming, and music. Can I drop out of school and learn how to start my own python business. A university with about 50 students in China, a major in Mathematics (allocat

[:, Alpha_k] + svm.b) Error_k = Output_k-float (Svm.train_y[alpha_k]) return Error_k # Update The error cache for Alpha K after optimize Alpha K def updateerror (SVM, alpha_k): Error = Calcerror (SVM, Alpha_k) Svm.errorcache[alpha_k] = [1, ERROR] # Select Alpha J which has the biggest step def selectalpha_j (SVM, alpha_i, err Or_i): svm.errorcache[alpha_i] = [1, Error_i] # mark as valid (has been optimized) Candidatealphalist = nonzero (s Vm.errorcache[:, 0]. A) [0] # mat. A return Array ma

#-*-Coding:utf-8-*-"""Created on Mon APR 3 09:37:52 2017@author: zuihaodaxuepaiming"""Import BS4Import requestsFrom BS4 import BeautifulSoupdef gethtmltext (URL):Tryr = requests.get (URL, timeout = 30)R.raise_for_status ()r.encoding = r.apparent_encodingReturn R.textExceptReturn 'def fillunivtext (Html,uinfo):Soup = BeautifulSoup (html, "Html.parser")for TR in Soup.find (' tbody '). Children:If Isinstance (tr, bs4.element.Tag):TDS = TR (' TD ')Uinfo.append ([Tds[0].string, Tds[1].string, tds[3].

From BS4 import BeautifulSoupImport requestsImport BS4 #bs4. Element.tag#获取网页页面HTMLdef gethtmltext (URL):Tryr = requests.request ("Get", url,timeout=30)R.raise_for_status () #如不是200报错r.encoding = r.apparent_encoding #猜测编码然后赋予给解码 encoding modeDemo = R.textSoup = BeautifulSoup (demo, "Html.parser") #做汤Return soupExceptReturn ""#分析并返回列表def fillunivlist (ulist,html):Soup = htmlfor TR in Soup.find ("Tbody"). Children: #从汤里找tbody标签的儿子遍历If Isinstance (tr,bs4.element.tag): #如果标签是标签名字TDS = TR ("TD") #寻找t

source code to know where the post data is actually sent: Well, this is the address for submitting post data. In the address bar, the complete address should be as follows: Http://jwxt.sdu.edu.cn: 7777/pls/wwwbks/bks_login2.login (The access method is simple. You can click the link in Firefox to view the link address) 5. Test the knife The next task is to use python to simulate sending a post data and obtain the returned cookie value. For more in

to write to the file"" Defines writing data to the file function "" " forIinchrange (num): U=Ulist[i] with open ('D:/test.txt','a') as data:Print(U, file=data)if __name__=='__main__': List= [] # I previously put list=[] in the for loop of the Get_data () function, resulting in each loop emptying the list before appending the data, and finally traversing the last set of data ...URL='http://www.zuihaodaxue.com/shengyuanzhiliangpaiming2018.html'HTML=get_html (URL)Get_data (HTML, list)Write_data (

: WWW.RUNOOB.COMwww.runoob.comWww.runoob.comWww.Runoob.Com1249. Capitalize the initial lettertitle: http:acm.sdut.edu.cn/onlinejudge2/index.php/home/index/problemdetail/pid/1442. html code: NUM=(int) (input ()) forIinchRange (0,num): s= input (). Split (" ") #a space split is a string converted into a list.List =[] list.append ((int) (s[0])) list.append ((int) (s[1])) list.append ((int) (s[2]) Ave= (List[0]+list[1]+list[2])/3#Calculate AverageIsLarge = 0#the number of 3 numbers greater than t

This article is just extrapolate, using Python to demonstrate a way of thinking that applies to different websites or forums. Do not use illegal acts.The following code is pro-test effective, cracked some users weak password. Of course, the success rate of the crack is related to your dictionary, the more complex the dictionary, the higher the success rate, but the longer it takes.#-*-Coding:utf-8-*-__author__ =' Rocky '# Crack 211 The user password o

Learn what Python thinks is a fun thing to do. See a lot of things about python on the Internet, see this lesson, think is just elective, others can also choose, they want to not be others fall, others will, I will not be.And think that Python is a very powerful tool, since there is such a powerful tool, will have a certain help in the future life, they will lear

2017-07-29 23:20:24Main technical route: requests+bs4+ formatted outputImportRequests fromBs4ImportBeautifulsoupurl='http://www.zuihaodaxue.com/zuihaodaxuepaiming2017.html'defgethtml (URL):#Open Web page is risky, need to use TRY-EXCEPT statement for risk controlKV = {'user-agent':'mozilla/5.0 (Windows NT 6.3; Win64; x64; rv:54.0) gecko/20100101 firefox/54.0'} Try: R= Requests.get (url,headers=kv) r.raise_for_status ()#If Open fails, a Httperror exception is thrown #encoding is a codin