from pyparsing import Word, OneOrMore, Optional, Group, Suppress, alphanums
class Gate:
def __init__(self):
self.is_open = False
def __str__(self):
return 'open' if self.is_open else 'closed'
def open(self):
print('opening the gate')
self.is_open = True
def close(self):
print('closing the gate')
self.is_open = False
class Garage:
def __init__(self):
self.is_open = False
def __str__(self):
return 'open' if self.is_open else 'closed'
def open(self):
print('opening the garage')
self.is_open = True
def close(self):
print('closing the garage')
self.is_open = False
class Aircondition:
def __init__(self):
self.is_on = False
def __str__(self):
return 'on' if self.is_on else 'off'
def turn_on(self):
print('turning on the aircondition')
self.is_on = True
def turn_off(self):
print('turning off the aircondition')
self.is_on = False
class Heating:
def __init__(self):
self.is_on = False
def __str__(self):
return 'on' if self.is_on else 'off'
def turn_on(self):
print('turning on the heating')
self.is_on = True
def turn_off(self):
print('turning off the heating')
self.is_on = False
class Boiler:
def __init__(self):
self.temperature = 180 # in fahrenheit
def __str__(self):
return 'boiler temperature: {}'.format(self.temperature)
def increase_temperature(self, amount):
print("increasing the boiler's temperature by {} degrees".format(amount))
self.temperature += amount
def decrease_temperature(self, amount):
print("decreasing the boiler's temperature by {} degrees".format(amount))
self.temperature -= amount
class Fridge:
def __init__(self):
self.temperature = 35 # in fahrenheit
def __str__(self):
return 'fridge temperature: {}'.format(self.temperature)
def increase_temperature(self, amount):
print("increasing the fridge's temperature by {} degrees".format(amount))
self.temperature += amount
def decrease_temperature(self, amount):
print("decreasing the fridge's temperature by {} degrees".format(amount))
self.temperature -= amount
def main():
word = Word(alphanums)
command = Group(OneOrMore(word))
token = Suppress("->")
device = Group(OneOrMore(word))
argument = Group(OneOrMore(word))
event = command + token + device + Optional(token + argument)
gate = Gate()
garage = Garage()
airco = Aircondition()
heating = Heating()
boiler = Boiler()
fridge = Fridge()
tests = ('open -> gate',
'close -> garage',
'turn on -> aircondition',
'turn off -> heating',
'increase -> boiler temperature -> 20 degrees',
'decrease -> fridge temperature -> 6 degree')
open_actions = {'gate':gate.open, 'garage':garage.open, 'aircondition':airco.turn_on,
'heating':heating.turn_on, 'boiler temperature':boiler.increase_temperature,
'fridge temperature':fridge.increase_temperature}
close_actions = {'gate':gate.close, 'garage':garage.close, 'aircondition':airco.turn_off,
'heating':heating.turn_off, 'boiler temperature':boiler.decrease_temperature,
'fridge temperature':fridge.decrease_temperature}
for t in tests:
if len(event.parseString(t)) == 2: # no argument
cmd, dev = event.parseString(t)
cmd_str, dev_str = ' '.join(cmd), ' '.join(dev)
if 'open' in cmd_str or 'turn on' in cmd_str:
open_actions[dev_str]()
elif 'close' in cmd_str or 'turn off' in cmd_str:
close_actions[dev_str]()
elif len(event.parseString(t)) == 3: # argument
cmd, dev, arg = event.parseString(t)
cmd_str, dev_str, arg_str = ' '.join(cmd), ' '.join(dev), ' '.join(arg)
num_arg = 0
try:
num_arg = int(arg_str.split()[0]) # extract the numeric part
except ValueError as err:
print("expected number but got: '{}'".format(arg_str[0]))
if 'increase' in cmd_str and num_arg > 0:
open_actions[dev_str](num_arg)
elif 'decrease' in cmd_str and num_arg > 0:
close_actions[dev_str](num_arg)
if __name__ == '__main__':
main()
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