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definition and testing of a class
Object Oriented Python example from a Well House Consultants training course
More on Object Oriented Python [link]
Source code: drink.py Module: Y106

"""Define a class "drink", where each drink
has a type, a stength and we know a volume.
Provide a method to set the person who's having
the drink, and a method to return the person's
name or a default value if that hasn't been set"""


class drink:
   def __init__ (self,type,stength,amount):
      self.brand = type
      self.perc = stength
      self.cc = amount
      self._person = None
      drink.owmany += 1
   def setwhom (self,person):
      self._person = person
   def getwhom (self):
      if self._person:
         return self._person
      else:
         return "Dunno"
   def getcount (self):
      return drink.owmany
   def gettype (self):
      return self.brand
   def getalco (self):
      return self.cc * self.perc / 100.0

# add a class attribute to countr the number of drinks

drink.owmany = 0

# Test code - ensure that our drinks class works

if __name__ == "__main__":
    round = []
    round.append( drink("IPA",3.6,568) )
    round[0].setwhom("David")
    round.append( drink("IPA",3.6,568) )
    round.append( drink("6X",4.3,568) )
    round.append( drink("whine",12.5,175) )
    round[2].review = "A really nice tipple at the end of walk"

    for tipple in round:
        print tipple.getcount(),"drinks in round"
        print tipple.getwhom(),"had a",tipple.gettype(),"with", tipple.getalco(),"cc of alcohol"
        if tipple.cc > 500:
            print "a long drink"
        elif tipple.cc > 100:
            print "middle of the road"
        else:
            print "a short"
        try:
           if tipple.review:
               print tipple.review
        except:
           pass

    print drink.owmany

Learn about this subject
This module and example are covered on the following public courses:
 * Learning to program in Python
 * Python Programming
 * Intermediate Python
Also available on on site courses for larger groups

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