/
params.py
46 lines (39 loc) · 1.13 KB
/
params.py
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# -*- coding: utf-8 -*-
import collections
import json
import config
from utils import W,L,E,EX
_FIELD_DEFAULTS = {
'fridge_setpoint': 16,
'fridge_difference': 0.2,
'overshoot_delay': 720, # 12 minutes
'overshoot_factor': 1, # ºC
}
class Params(dict):
class Error(Exception):
pass
def __init__(self):
self.update(_FIELD_DEFAULTS)
def __getattr__(self, k):
return self[k]
def __setattr__(self, k, v):
# fail if we set a bad value
self[k]
self[k] = v
def load(self, f = None):
if not f:
try:
f = file(config.PARAMS_FILE, 'r')
except IOError, e:
W("Missing parameter file, using defaults. %s", e)
return
u = json.load(f)
for k in u:
if k not in self:
raise self.Error("Unknown parameter %s=%s in file '%s'" % (str(k), str(u[k]), getattr(f, 'name', '???')))
self.update(u)
def save(self, f = None):
if not f:
f = file(config.PARAMS_FILE, 'w')
json.dump(self, f, sort_keys=True, indent=4)
f.flush()