[Tutor] my text adventure

[david]

hello again python tutors! my latest attempt to learn python.
any comments or suggestions most greatly appreciated. 

import sys
import string
ncoords = [0,0]
class Room:
    def __init__(self,name):
        self.exits = {}
        self.contents = []
        self.name = name
        self.coords = ()
room1 = Room('room1')
room2 = Room('room2')
room3 = Room('room3')
room1.coords = (0,0)
room2.coords = (0,1)
room3.coords = (0,-1)
room1.exits = {'n':room2,'s':room3}
room2.exits = {'s':room1}
room3.exits = {'n':room1}
world = { (0,0):room1, (0,1):room2, (0,-1):room3}

class Object:
    def __init__(self,name):
        self.name = name

    def getname(self):
        return self.name

class Player:
    def __init__(self,name):
        self.name = name
        self.location = None
        self.inventory = []
        self.wielded = None
    def look(self):
        print self.location.name

    def move(self,direction):
        if self.location.exits.has_key(direction):
            self.location = self.location.exits[direction]
            print self.location.name
        else: print 'alas, you cannot go that way'
    def dig(self,direction):
        lcoords = list(self.location.coords)
        if self.location.exits.has_key(direction):
            print 'there is already an exit there'
        
        
        elif direction == 'n':
            ncoords[1] == lcoords[1] + 1
        elif direction == 's':
            ncoords[1] == lcoords[1] - 1
        elif direction == 'e':
            ncoords[0] == lcoords[0] + 1
        elif direction == 'w':
            ncoords[0] == lcoords[0] - 1
        elif world.has_key(tuple(ncoords)):
            print "there is a room there"
            #so add exits
        else:
            #make a room and add exits to and from
            pass
    def wield(self,what):
        self.wielded = what
    def wear(self,what):
        pass
    def take(self,what):
        pass
    def drop(self,what):
        pass
    def do(self):
        cmd = raw_input('>')
        if cmd == 'l':
            self.look()
        elif cmd in ['n','s','e','w']:           
            self.move(cmd)
        elif cmd == 'quit':
            sys.exit()
        elif cmd == 'i':
            for a in self.inventory:
                print a.getname()
        else:
            print 'what?'

p = Player('david')
sword = Object('sword')
hat = Object('hat')

p.location = world[(0,0)]
p.inventory.append(sword)
p.inventory.append(hat)
while 1:
    p.do()
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