}
URI = "http://api.openweathermap.org/data/2.5/weather"
def url( self, **kwds ):
"""Produce a url by joining the class' URI and OPTs with any keyword parameters"""
return self.URI + "?" + urlencode( dict( self.OPT, **kwds ))
def __getitem__( self, key ):
"""Obtain the temperature of the city's matching our Attribute's name, convert
it to an appropriate type; return a value appropriate to the request."""
try:
# eg. "http://api.openweathermap.org/...?...&q=City Name"
data = urlopen( self.url( q=self.name )).read()
if type( data ) is not str: # Python3 urlopen.read returns bytes
data = data.decode( 'utf-8' )
weather = json.loads( data )
assert weather.get( 'cod' ) == 200 and 'main' in weather, \
weather.get( 'message', "Unknown error obtaining weather data" )
cast = float if isinstance( self.parser, REAL ) else int
temperature = cast( weather['main']['temp'] )
except Exception as exc:
logging.warning( "Couldn't get temperature for %s via %r: %s",
self.name, self.url( q=self.name ), exc )
raise
return [ temperature ] if self._validate_key( key ) is slice else temperature
def __setitem__( self, key, value ):
raise Exception( "Changing the weather isn't that easy..." )
sys.exit( main( attribute_class=Attribute_weather ))
}
URI = "http://api.openweathermap.org/data/2.5/weather"
def url( self, **kwds ):
"""Produce a url by joining the class' URI and OPTs with any keyword parameters"""
return self.URI + "?" + urlencode( dict( self.OPT, **kwds ))
def __getitem__( self, key ):
"""Obtain the temperature of the city's matching our Attribute's name, convert
it to an appropriate type; return a value appropriate to the request."""
try:
# eg. "http://api.openweathermap.org/...?...&q=City Name"
data = urlopen( self.url( q=self.name )).read()
if type( data ) is not str: # Python3 urlopen.read returns bytes
data = data.decode( 'utf-8' )
weather = json.loads( data )
assert weather.get( 'cod' ) == 200 and 'main' in weather, \
weather.get( 'message', "Unknown error obtaining weather data" )
cast = float if isinstance( self.parser, REAL ) else int
temperature = cast( weather['main']['temp'] )
except Exception as exc:
logging.warning( "Couldn't get temperature for %s via %r: %s",
self.name, self.url( q=self.name ), exc )
raise
return [ temperature ] if self._validate_key( key ) is slice else temperature
def __setitem__( self, key, value ):
raise Exception( "Changing the weather isn't that easy..." )
sys.exit( main( attribute_class=Attribute_weather ))
def __setitem__( self, key, value ):
try:
# vvvv -- Process an EtherNet/IP CIP Write [Tag [Fragmented]].
#
# We'll just store the value, and output the write request (and the value written) to
# our time-series history file.
#
super( Attribute_historize, self ).__setitem__( key, value )
self.__logger.write( { 'write': value }, serial=(self.name, (
key.indices( len( self ))[0] if isinstance( key, slice ) else key,
key.indices( len( self ))[1]-1 if isinstance( key, slice ) else key,
)))
# ^^^^
except Exception as exc:
# vvvv -- Process an EtherNet/IP CIP Write [Tag [Fragmented]] Exception.
#
# Something went wrong with the Write request processing. Log something intelligent and
# re-raise the exception, to return a failure to the EtherNet/IP client.
#
self.__logger.comment(
"%s: PLC I/O Write Tag %20s[%5s-%-5s] Exception: %s" % (
history.timestamp(), self.name,
key.indices( len( self ))[0] if isinstance( key, slice ) else key,
key.indices( len( self ))[1]-1 if isinstance( key, slice ) else key,
exc ))
# ^^^^
raise
sys.exit( main( attribute_class=Attribute_historize ))
# vvvv -- Process an EtherNet/IP CIP Write [Tag [Fragmented]].
#
# We'll just store the value, and output the write request (and the value written) to
# our time-series history file.
#
super(Attribute_historize, self).__setitem__(key, value)
self.__logger.write({'write': value},
serial=(self.name, (
key.indices(len(self))[0] if isinstance(
key, slice) else key,
key.indices(len(self))[1] -
1 if isinstance(key, slice) else key,
)))
# ^^^^
except Exception as exc:
# vvvv -- Process an EtherNet/IP CIP Write [Tag [Fragmented]] Exception.
#
# Something went wrong with the Write request processing. Log something intelligent and
# re-raise the exception, to return a failure to the EtherNet/IP client.
#
self.__logger.comment(
"%s: PLC I/O Write Tag %20s[%5s-%-5s] Exception: %s" %
(history.timestamp(), self.name, key.indices(len(self))[0] if
isinstance(key, slice) else key, key.indices(len(self))[1] -
1 if isinstance(key, slice) else key, exc))
# ^^^^
raise
sys.exit(main(attribute_class=Attribute_historize))
