"""Demonstration that in Python ...
all operations are methods
all variables (including code) are objects
all blocks are defined using insets.
"""

class clothing:
  """ A simple class with a constructor and two
  property accessors. We also redefine addition
  and the equality test for clothing """

  def __init__(self,colour,weight):
    self.colour=colour
    self.weight=weight

  def getcolour(self):
    return self.colour

  def getweight(self):
   return self.weight

  def __add__(self,second):
    result = clothing(self.colour,self.weight)
    result.weight += second.weight
    result.colour += " and " + second.colour
    return result

  def __eq__(first,second):
    if first.weight == second.weight and \
        first.colour == second.colour: return 1
    return 0

# Test code - to be run only if this file is
# run standalone

if __name__ == "__main__":
  wearing = []
  wearing.append(clothing("blue",1.0))
  wearing.append(clothing("brown",1.25))
  # Following lines both run the __add__ method
  outfit = wearing[0] + wearing[1]
  wearing.append(outfit)
  wearing.append(outfit.__add__(wearing[1]))
  # Following lines show that methods are objects
  print wearing.append
  print wearing[0].getcolour
  for haveon in wearing:
    print "I am wearing something coloured",haveon.getcolour(),
    print "And weighing",haveon.getweight(),"kgs"

[localhost:~/ipy] graham% python address
<built-in method append of list object at 0x3c38a0>
<bound method clothing.getcolour of <__main__.clothing instance at 0x40a580>>
I am wearing something coloured blue And weighing 1.0 kgs
I am wearing something coloured brown And weighing 1.25 kgs
I am wearing something coloured blue and brown And weighing 2.25 kgs
I am wearing something coloured blue and brown and brown And weighing 3.5 kgs
[localhost:~/ipy] graham%