Rather stuck with this one, I'd like to automatically (re)set the
propery "relaystate" when one of the others (Tm, Tset, Th) is set,
regardless of wether their value has changed.
Ingo
My code so far:
from collections import namedtuple
import logging
logger = logging.getLogger()
logger.setLevel(logging.DEBUG)
stream_handler = logging.StreamHandler()
stream_handler.setLevel(logging.DEBUG)
formatter = logging.Formatter(
'[%(levelname)-8s] %(asctime)s (%(name)-8s) - %(message)s',
'%Y-%m-%d %H:%M:%S',
)
stream_handler.setFormatter(formatter)
logger.addHandler(stream_handler)
class Thermostat():
def __init__(self, Tm=20, Tset=20, Th=0.3):
logger.debug("__INIT__")
self.Tm = Tm
self.Tset = Tset
self.Th = Th
self.relaystate = None
@property
def Tm(self):
logger.debug("GETTER Tm")
return self._Tm
@Tm.setter
def Tm(self, value):
logger.debug("SETTER Tm")
self._Tm = value
@property
def Tset(self):
logger.debug("GETTER Tset")
return self._Tset
@Tset.setter
def Tset(self, value):
logger.debug("SETTER Tset")
self._Tset = value
@property
def Th(self):
logger.debug("GETTER Th")
return self._Th
@Th.setter
def Th(self, value):
logger.debug("SETTER Th")
self._Th = value
@property
def relaystate(self):
logger.debug("GETTER relaystate")
return self._relaystate
@relaystate.setter
def relaystate(self, value):
logger.debug("SETTER relaystate")
#on init while setting Tm, Tset and Th are not known
#so relaystate can not be calculated
try:
lower = self.Tset-self.Th
upper = self.Tset+self.Th
except AttributeError as e:
logger.debug("SETTER relaystate : %s", e)
self._relaystate = None
rlstate = namedtuple('relaystate', ['heat', 'cool'])
if self.Tm < lower:
value = rlstate(1,0)
elif self.Tm > upper:
value = rlstate(0,1)
elif self.Tm > lower and self.Tm < upper:
value = rlstate(0,0)
self._relaystate = value
if __name__ == "__main__":
TS1 = Thermostat()
TS1.Tset = 44
print("heat : ",TS1.relaystate.heat,"cool : ",TS1.relaystate.cool)
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