python 2.7 - Using a dictionary that takes a list, a, as an argument and returns a list containing the elements of a that occur exactly once -

-

मुझे थोड़ी देर (पायथन 2.x) में फंस गया हूं

dict , एक विधि केवल_ऑन्स (ए) लिखें, जो एक सूची, a को एक तर्क के रूप में लेता है और एक जो वास्तव में एक बार होते हैं तत्वों को उसी क्रम में a । 

  def एक बार (ए): सूची = [] डी = {} रन = 0 में प्रकट होने चाहिए। I में एक: डी [i] = डी। एचएस_की (i) प्रिंट ([k के लिए डी.कीज़ () में) यदि नहीं तो [k]]))   
 यह प्रिंट करता है  
 
     
 
 पाठ "> 
 आपकी कुंजी समस्या यह है कि आप शब्दकोश प्राप्त करने के लिए शब्दकोश की चाबियाँ (स्पष्ट  .keys ()  अनावश्यक है, जैसा कि आप डिफ़ॉल्ट रूप से किसी शब्दकोश की कुंजी पर पुनरावृत्त करते हैं); शब्दकोश हैं  अनॉर्डेड  इसके बजाय, आपको इनपुट ऑर्डर का उपयोग करने की आवश्यकता है:  
  def only_once (a): d = {} में आइटम के लिए: यदि आइटम नहीं में डी: डी [आइटम] = 0 डी [आइटम ] + = 1 रिटर्न [मद में आइटम के लिए अगर डी [मद] == 1]   
 ध्यान दें कि आपका कोड कभी भी  सूची  का उपयोग नहीं करता है (जो, जैसा कि एक अंतर्निहित छाया, एक ऐसा नाम है जिसका उपयोग आप अपने चर के लिए नहीं करना चाहिए) और  चलाएं , इसलिए उन्हें हटा दिया जाना चाहिए था।

Comments

Post a Comment

Popular posts from this blog

php - PDO bindParam() fatal error -

-
I am trying to learn PDO, now I have written this small code, but it gives me a serious error: < P> Fatal error: Call a member function at a non-object dot () ... $ con = new mysqli ("127.0.0.1", "root", "", "csvdangercheck"); $ Query = $ con- & gt; ("Id,` var1`, `var2`) values ​​(" id,: var1,: var2) ";); $ query- & gt; bypass pattern (': id', $ id); $ query- & gt; BindParam (': var1', $ VAL1); $ Query- & gt; bindParam (': var2', $ val2); $ Query-> Executed (); I Trying to use print_r ($ con-> errorInfo ()) but Fatal error: Undefined method mysqli :: errorInfo ( ) ... can someone tell me what am I missing? Flaffeh said, you have PDO Missing Mysqy, try it: $ con = new PDO ('mysql: host = 127.0.0.1; dbname = csvdangercheck', 'root', '');
Read more

logging - How can I log both the Request.InputStream and Response.OutputStream traffic in my ASP.NET MVC3 Application for specific Actions? -

-
For a specific set of tasks, I need to log in to the incoming request inputstream as well as outgoing response. is. I am using an ActionFilterAttribute for this and overriding the OnActionExecuted and OnResultExecuted methods. So I'm starting with this idea ... Public category ActionLoggerAttribute: ActionFilterArrbit {Public Override Zero On-Offed Execution (ActionActioned Contact Filter Filter) {base.OnActionAxecuted (FilterContext); HttpRequestBase request = filterContext.HttpContext.Request; // TODO: Log the request. InputStream} Public Override Zero OnResultExecuted (ResultExecutedContext FilterContext) {base.OnResultExecuted (filterContext); HTTPRPSPointBase Response = FilterContacts Hpptex response; // TODO: Log on Response.OutputStream}} Ideally I'll hook it up with enterprise library logging because I'm already using it for error logging. Am I reaching the input and output stream at the right time? Can I easily use the Enterprise Library to log i
Read more

java - Why my included JSP file won't get processed correctly? -

-
I am trying to create Java web framework (and learning), and on the basis of 'Code Generator In the process of making the material view of the database in the process of development, I stumbled into a difficulty, which I do not know how to solve it. First of all, I want the following index.jsp : & lt; Body & gt; Use all pages to be created. & Lt;% @ include file = "header.jsp"% & gt; & Lt; Hours / & gt; & Lt;% @ included file = "body.jsp"%> & Lt; Hours / & gt; & Lt;% @ include file = "footer.jsp"% & gt; & Lt; / Body & gt; And, in body.jsp , I should have it like this: & lt; Jsp: include page = "$ {Application_modul}"%> Where application_modul is an attribute defined in its controller: request.setAttribute ("application_modul", "USER_ACCOUNT \\ ' View_user_account.jsp "); This file can be found properly, but the processed JSP does
Read more