[Courses] [python] Object-oriented programming

[lenore borisova]

Problem 1:


  1
  2 import random, sys
  3
  4 class Flashcard :
  5
  6         count = 0
  7
  8         def __init__(self, q, a) :
  9                 self.question = q
 10                 self.answer = a
 11
 12         def print_question(self) :
 13                 print self.question
 14
 15         line = "============================================="
 16
 17         def quiz_user(self) :
 18                 print self.line
 19                 self.print_question()
 20                 print self.line
 21                 ans = raw_input("What is the name of this element? ")
 22
 23                 if ans.strip().lower() == self.answer.strip().lower() :
 24                         print "Good job!"
 25                         Flashcard.count += 1
 26                         return Flashcard.count
 27
 28                 if ans.strip().lower() == "q" :
 29                         print "Goodbye! You answered",
 30                         print Flashcard.count,
 31                         print "correctly."
 32                         raise SystemExit
 33
 34                 print "Sorry, the answer was:", self.answer
 35                 return False
 36
 37 cards = [
 38         Flashcard("He", "helium"),
 39         Flashcard("N", "nitrogen"),
 40         Flashcard("Se", "selenium"),
 41         Flashcard("Bi", "bismuth"),
 42         Flashcard("Na", "sodium"),
 43         Flashcard("Rb", "rubidium"),
 44         Flashcard("Sn", "tin"),
 45         Flashcard("Mg", "magnesium"),
 46         Flashcard("Os", "osmium"),
 47         ]
 48
 49 while True :
 50         random.choice(cards).quiz_user()




Problem 2:



  1
  2
  3 import random, sys
  4
  5 class Flashcard :
  6
  7         count = 0
  8
  9         def __init__(self, q, a) :
 10                  self.question = q
 11                  self.answer = a
 12
 13         def print_question(self) :
 14                   print self.question
 15
 16         line = "============================================="
 17
 18         def quiz_user(self) :
 19
 20                   print self.line
 21                   self.print_question()
 22                   print self.line
 23                   ans = raw_input("How do you say this number in
Japanese? ")
 24
 25                   if ans.strip().lower() == self.answer.strip().lower()
:
 26                           print "Good job!"
 27                           Flashcard.count += 1
 28                           return Flashcard.count
 29
 30                   if ans.strip().lower() == "q" :
 31                           print "Goodbye! You answered",
 32                           print Flashcard.count,
 33                           print "correctly."
 34                           raise SystemExit
 35
 36                   print "Sorry, the answer was:", self.answer
 37                   return False
 38
 39 cards = [
 40         Flashcard("1", "ichi"),
 41         Flashcard("2", "ni"),
 42         Flashcard("3", "san"),
 43         Flashcard("4", "shi"),
 44         Flashcard("5", "go"),
 45         ]
 46
 47 test = raw_input("Enter c for create flashcards, p to quiz yourself, or
q to quit: ")
 48
 49
 50 if test == "q" :
 51         print "Goodbye!"
 52         raise SystemExit
 53
 54 if test == "c" :
 55                 q = raw_input("Enter integer: ")
 56                 a = raw_input("Enter translation: ")
 57                 cards.append(Flashcard(q,a))
 58                 print "Flashcard has been created! Now quiz yourself!"
 59
 60 while True :
 61         random.choice(cards).quiz_user()



The above works. However, I tried a variation below that does not.

When I tried to create 2 classes for Problem 2, it runs although it doesn't
appear to actually append the item to the cards list or to keep it in the
list because it doesn't show up in the quiz afterward this way (but does in
the previous version). I should get sleep so I'm going to stop here for the
night (morning, now) and continue this when I can free up more time.


  1
  2
  3 import random, sys
  4
  5
  6 class Quiz :
  7
  8           def __init__(self, q, a) :
  9                   self.question = q
 10                   self.answer = a
 11
 12           def print_question(self) :
 13                   print self.question
 14
 15           print "JAPANESE NUMBERS GAME\n"
 16           print "Create Flashcards: Example 1 and ichi\n"
 17
 18           q = raw_input("Enter an integer: ")
 19           a = raw_input("Enter the English translation: ")
 20
 21
 22           def __add__(self,q,a):
 23
 24                 self.cards.append(Flashcard(q,a))
 25
 26           print "Flashcard has been created. Let's quiz you!\n"
 27
 28
 29 class Flashcard :
 30
 31         count = 0
 32
 33         def __init__(self, q, a) :
 34                  self.question = q
 35                  self.answer = a
 36
 37         def print_question(self) :
 38                   print self.question
 39
 40         line = "============================================="
 41
 42         def quiz_user(self) :
 43
 44                   print self.line
 45                   self.print_question()
 46                   print self.line
 47                   ans = raw_input("How do you say this number in
Japanese? ")
 48
 49                   if ans.strip().lower() == self.answer.strip().lower()
:
 50                           print "Good job!"
 51                           Flashcard.count += 1
 52                           return Flashcard.count
 53
 54                   if ans.strip().lower() == "q" :
 55                           print "Goodbye! You answered",
 56                           print Flashcard.count,
 57                           print "correctly."
 58                           raise SystemExit
 59
 60                   print "Sorry, the answer was:", self.answer
 61                   return False
 62
 63 cards = [
 64         Flashcard("1", "ichi"),
 65         Flashcard("2", "ni"),
 66         Flashcard("3", "san"),
 67         Flashcard("4", "shi"),
 68         Flashcard("5", "go"),
 69         ]
 70
 71 while True : 72         random.choice(cards).quiz_user()



Lenore