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comparison weather_server/types.py @ 11:52ef21607b31

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server: Create endpoint to get some recent readings.
author Paul Fisher <paul@pfish.zone>
date Sun, 06 Oct 2019 13:11:11 -0400
parents efe7a1eff167
children beb42c835c52
comparison
equal deleted inserted replaced
10:6d59f038a58b 11:52ef21607b31
3 import datetime 3 import datetime
4 import math 4 import math
5 import typing as t 5 import typing as t
6 6
7 import attr 7 import attr
8 import pytz 8
9 from . import common
9 10
10 11
11 def c_to_f(c: float) -> float: 12 def c_to_f(c: float) -> float:
12 return c * 9 / 5 + 32 13 return c * 9 / 5 + 32
13 14
53 def as_dict(self) -> t.Dict[str, t.Any]: 54 def as_dict(self) -> t.Dict[str, t.Any]:
54 return attr.asdict(self, recurse=False) 55 return attr.asdict(self, recurse=False)
55 56
56 @classmethod 57 @classmethod
57 def from_now(cls, **kwargs) -> 'Reading': 58 def from_now(cls, **kwargs) -> 'Reading':
58 return cls(ingest_time=_utc_now(), **kwargs) 59 return cls(ingest_time=common.utc_now(), **kwargs)
59 60
60 @property 61 @property
61 def _gamma(self) -> float: 62 def _gamma(self) -> float:
62 return ( 63 return (
63 math.log(self.rh_pct / 100) + 64 math.log(self.rh_pct / 100) +
64 _MAGNUS_B * self.temp_c / (_MAGNUS_C + self.temp_c)) 65 _MAGNUS_B * self.temp_c / (_MAGNUS_C + self.temp_c))
65
66
67 def _utc_now():
68 return datetime.datetime.utcnow().replace(tzinfo=pytz.UTC)