[pygame] Please explain what I've done wro

["Roel Smulders" <mstrblstrprdctns@xxxxxxxxxxx>]

it seems to me that you should not write Person.population
etc, but self.population

When all person. is replaced by self.  the code works as promised!
:

class Person:
    population=0

    def __init__(self,name):
        self.name=name
        print '(Initialising %s)' % self.name
        self.population += 1

    def __del__(self):
        print "%s says bye." % self.name

        self.population -= 1

        if self.population == 0:
            print "I am the last one"
        else:
            print "There are still %d people left." % self.population

    def sayHi(self):
        '''Greeting by the person.

        That's all it does.'''
        print "Hi, my name is %s" % self.name

    def howMany(self):
        if self.population==1:
            print "I am on the only person here."
        else:
            print "We have %d persons here." % self.population

Jason=Person("Jason")
Jason.sayHi()
Jason.howMany()

Sophie=Person("Sophie")
Sophie.sayHi()
Sophie.howMany()

Jason.sayHi()