questions.py

   1 #!/usr/bin/python
   2 import sys, string
   3 from xml.dom import minidom, Node
   4 import os
   5 import random as r
   6
   7 class Questions:
   8    loud = False
   9
  10    def GetQuestions(self):
  11       if self.loud:
  12          print "Get Questions"
  13
  14       self.GetHints ()
  15
  16       self.questions = []
  17       self.nquestions = 0
  18
  19       for q in self.file.getElementsByTagName("question"):
  20          id = q.getAttribute ("id")
  21
  22          hint = self.GetHint(id)
  23
  24          answers = []
  25          for c in q.childNodes:
  26             if c.nodeType == Node.ELEMENT_NODE:
  27
  28                content=[]
  29                for child in c.childNodes:
  30                   if child.nodeType == Node.TEXT_NODE:
  31                      content.append(child.nodeValue)
  32                if content:
  33                   strContent = string.join(content)
  34
  35                if c.nodeName == "textquestion":
  36                   textquestion = strContent
  37                elif c.nodeName == "textanswer":
  38                   if c.getAttribute("correct") == "true":
  39                      correct = True
  40                   else:
  41                      correct = False
  42                   answer = content
  43                   answers.append ([answer, correct])
  44
  45          self.questions.append ([id, textquestion,answers, hint])
  46          self.nquestions += 1
  47
  48    def GetHints(self):
  49       if self.loud:
  50          print "Get hints"
  51
  52       self.hints = []
  53       for h in self.root.getElementsByTagName ("hint"):
  54          id = h.getAttribute ("question")
  55          content=[]
  56          for child in h.childNodes:
  57             if child.nodeType == Node.TEXT_NODE:
  58                content.append(child.nodeValue)
  59          if content:
  60             strContent = string.join(content)
  61
  62          ss = strContent.split("<a href=\"http://")[1].split("\">")[0]
  63
  64          self.hints.append ([id, ss])
  65
  66    def GetHint(self,id):
  67       if self.loud:
  68          print "Get hint:",id
  69
  70       for h in self.hints:
  71          if h[0] == id:
  72             return h[1]
  73       return ""
  74
  75    def GetChapters(self):
  76       if self.loud:
  77          print "Get chapters"
  78
  79       chapters=[]
  80       for c in self.root.childNodes:
  81          if c.nodeType == Node.ELEMENT_NODE:
  82             if c.nodeName == "chapter":
  83                id1 = c.getAttribute("id")
  84                name1 = c.getAttribute("name")
  85          for d in c.childNodes:
  86             if d.nodeType == Node.ELEMENT_NODE:
  87                if d.nodeName == "chapter":
  88                   id2 = d.getAttribute("id")
  89                   name2 = d.getAttribute("name")
  90             for e in d.childNodes:
  91                if e.nodeType == Node.ELEMENT_NODE:
  92                   if e.nodeName == "chapter":
  93                      id3 = e.getAttribute("id")
  94                      name3 = e.getAttribute("name")
  95
  96    def GetBasicProperties(self):
  97       if self.loud:
  98          print "Get basic properties"
  99
 100       #self.title = self.root.getAttribute("title")
 101       #publisher
 102       #version -published
 103       #contact
 104       #exam id="T" name="Technische Kenntnisse / Klasse A" duration="90" maxerrorpoints="13"
 105       return
 106
 107    def AskQuestion(self,id):
 108       if self.loud:
 109          print "Ask question:",id
 110
 111       for q in self.questions:
 112          if q[0] == id:
 113             break
 114
 115       self.id = id
 116       self.question = q[1]
 117
 118       self.series = self.Random()
 119       s = self.series
 120       self.correct = ["a","b","c","d"][s.index(0)]
 121       self.answera = q[2][s[0]][0][0]
 122       self.answerb = q[2][s[1]][0][0]
 123       self.answerc = q[2][s[2]][0][0]
 124       self.answerd = q[2][s[3]][0][0]
 125       self.answercorrect = self.answera #FIXME
 126       self.hint = q[3]
 127
 128    def RealAnswer(self,answer):
 129       s=self.series
 130       a=["a","b","c","d"]
 131       realchar = ["a","b","c","d"][[a[s[0]],a[s[1]],a[s[2]],a[s[3]]].index(answer)]
 132       return realchar
 133
 134    def Random(self):
 135       s = []
 136       ss = 0
 137       while True:
 138          nn = r.randint(0,3)
 139          if not nn in s:
 140             s.append (nn)
 141             ss += 1
 142             if ss == 4:
 143                break
 144       return s
 145
 146    def __init__(self,filename="Questions/questions.xml"):
 147       self.filename=filename
 148       self.file = minidom.parse (self.filename)
 149       self.root = self.file.documentElement
 150
 151       self.GetQuestions()