Configuration via environment
Project description
viaenv - Configuration via Environment for Python
viaenv
uses variable annotation
to populate values from environment variables.
Example
from datetime import timedelta
from viaenv import populate_from_env
class config:
port: int = 8080
log_file: str = '/var/log/server.log'
timeout: timedelta = timedelta(milliseconds=100)
populate_from_env(
config, prefix='SRV',
# If you don't pass env, populate_from_env will use os.environ
env={'SRV_PORT': '9000', 'SRV_TIMEOUT': '300ms'})
print(config.port) # 9000
print(cfg.timeout == timedelta(milliseconds=300) # True
Supported Types
bool
:y
,yes
,t
,true
,on
,1
->True
,n
,no
,f
,false
,off
,0
->False
date
:2019-05-18
datetime
:2019-05-18T13:43:12
dict
:{"x": 1, "y": 2}
(JSON format)float
:1.3
,1e7
int
:12
,0x12
,0o12
,0b12
list
:[1, 2, 3]
(JSON format)str
: Anything goestime
:13:43:12
timedelta
:10us
,20ms
,30s
,17m
,2h
,7d
,1h20m
You can add your types by calling register_type_parser(typ, parser)
where
typ
is a type (e.g. float
) and parser
is a one argument function that
will get the value as a string.
Project details
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