mousetrap2test.py

this is the most basic to learn python

#: c04:mousetrap2:MouseTrap2Test.py
# A better mousetrap using tables
import string, sys
sys.path += ['../statemachine', '../mouse']
from State import State
from StateMachine import StateMachine
from MouseAction import MouseAction

class StateT(State):
  def __init__(self):
    self.transitions = None
  def next(self, input):
    if self.transitions.has_key(input):
      return self.transitions[input]
    else:
      raise "Input not supported for current state"

class Waiting(StateT):
  def run(self): 
    print "Waiting: Broadcasting cheese smell"
  def next(self, input):
    # Lazy initialization:
    if not self.transitions:
      self.transitions = { 
        MouseAction.appears : MouseTrap.luring 
      }
    return StateT.next(self, input)

class Luring(StateT):
  def run(self):
    print "Luring: Presenting Cheese, door open"
  def next(self, input):
    # Lazy initialization:
    if not self.transitions:
      self.transitions = {
        MouseAction.enters : MouseTrap.trapping,
        MouseAction.runsAway : MouseTrap.waiting
      }
    return StateT.next(self, input)

class Trapping(StateT):
  def run(self):
    print "Trapping: Closing door"
  def next(self, input):
    # Lazy initialization:
    if not self.transitions:
      self.transitions = {
        MouseAction.escapes : MouseTrap.waiting,
        MouseAction.trapped : MouseTrap.holding
      }
    return StateT.next(self, input)

class Holding(StateT):
  def run(self):
    print "Holding: Mouse caught"
  def next(self, input):
    # Lazy initialization:
    if not self.transitions:
      self.transitions = {
        MouseAction.removed : MouseTrap.waiting
      }
    return StateT.next(self, input)

class MouseTrap(StateMachine):
  def __init__(self): 
    # Initial state
    StateMachine.__init__(self, MouseTrap.waiting)

# Static variable initialization:
MouseTrap.waiting = Waiting()
MouseTrap.luring = Luring()
MouseTrap.trapping = Trapping()
MouseTrap.holding = Holding()

moves = map(string.strip, 
  open("../mouse/MouseMoves.txt").readlines())
mouseMoves = map(MouseAction, moves)
MouseTrap().runAll(mouseMoves)
#<hr>
output = '''
Waiting: Broadcasting cheese smell
mouse appears
Luring: Presenting Cheese, door open
mouse runs away
Waiting: Broadcasting cheese smell
mouse appears
Luring: Presenting Cheese, door open
mouse enters trap
Trapping: Closing door
mouse escapes
Waiting: Broadcasting cheese smell
mouse appears
Luring: Presenting Cheese, door open
mouse enters trap
Trapping: Closing door
mouse trapped
Holding: Mouse caught
mouse removed
Waiting: Broadcasting cheese smell
mouse appears
Luring: Presenting Cheese, door open
mouse runs away
Waiting: Broadcasting cheese smell
mouse appears
Luring: Presenting Cheese, door open
mouse enters trap
Trapping: Closing door
mouse trapped
Holding: Mouse caught
mouse removed
Waiting: Broadcasting cheese smell
'''