def _get_display_units(self, quantity):
if self.factory.display_units is None:
du = unit_manager.default_units_for(
self._get_family_name(quantity))
else:
du = self.factory.display_units
return du
def _get_display_units(self, quantity):
if self.factory.display_units is None:
du = unit_manager.default_units_for(
self._get_family_name(quantity))
else:
du = self.factory.display_units
return du
def validate(self, object, name, value):
try:
if isinstance(value, Quantity):
if value.family_name == self.family_name:
return value
else:
if self.display_units is None:
units = unit_manager.default_units_for(self.family_name)
else:
units = self.display_units
return Quantity(value, units=units,
family_name=self.family_name)
except:
pass
self.error(object, name, self.repr(value))
def validate ( self, object, name, value ):
try:
if isinstance( value, Quantity ):
if value.family_name == self.family_name:
return value
else:
if self.display_units is None:
units = unit_manager.default_units_for( self.family_name )
else:
units = self.display_units
return Quantity( value, units = units,
family_name = self.family_name )
except:
pass
self.error( object, name, self.repr( value ) )
def __init__(self, data, units=None, name='', **traits):
""" Constructor. """
# Base class constructors.
super(Quantity, self).__init__(**traits)
# Flag used to save a compare if units/family_name compatibility has
# already been validated.
compatibility_checked = None
self.name = name
# Determine what units to use and if they are family compatible.
if units is None:
units = unit_manager.default_units_for(self.family_name)
# Allow for parsing a unit string as the units argument
else:
if isinstance(units, str):
units = unit_parser.parse_unit(units, suppress_warnings=False)
if 'family_name' not in traits:
# If the family name wasn't passed in, we try to guess it.
# TODO: Should lower() be called here--one can do an
# 'obj.family_name='xxx'" that would not call a 'lower' method.
try:
um = unit_manager
if self.family_name is None:
family_name = ''
else:
family_name = self.family_name.lower()
self.family_name = \
um.get_family_name(family_name) or \
em.get_family_name(name.lower())
# If units were passed in, but don't match the guessed family_name,
# punt.
if not unit_manager.is_compatible(units, self.family_name):
self.family_name = "unknown"
compatibility_checked = True
except KeyError:
logger.warn("Could not find family name: %s" % \
self.family_name or name)
else:
# fixme: This is subverting the FamilyNameTrait behavior,
# but it gets around proava ticket:1715-comment14,item 2.
self.family_name = traits['family_name']
# If we haven't checked compatibilty before, and units
if (compatibility_checked != True
and not unit_manager.is_compatible(units, self.family_name)):
raise ValueError("units (%s) not compatible with family_name (%s)" \
% (units.label, self.family_name))
self.units = units
# The following timing data is from using the code below the
# timings that sets values for 'data' and 'units' using the
# 'slow' method.
if isinstance(data, Quantity):
self.data = self._convert(data, units)
else:
self.data = data
# The 'fast' method of just stuffing the __dict__ values yields a
# performance improvement of 2x-- 0.0016 sec vs. 0.0035 sec per
# unit change (which creates a new Quantity object).
#self.__dict__['data'] = self._convert(data, units)
#self.__dict__['units'] = units
return
def __init__(self, data, units = None, name = '', **traits):
""" Constructor. """
# Base class constructors.
super(Quantity, self).__init__(**traits)
# Flag used to save a compare if units/family_name compatibility has
# already been validated.
compatibility_checked = None
self.name = name
# Determine what units to use and if they are family compatible.
if units is None:
units = unit_manager.default_units_for( self.family_name )
# Allow for parsing a unit string as the units argument
else:
if isinstance(units, basestring):
units = unit_parser.parse_unit(units, suppress_warnings=False)
if not traits.has_key('family_name'):
# If the family name wasn't passed in, we try to guess it.
# TODO: Should lower() be called here--one can do an
# 'obj.family_name='xxx'" that would not call a 'lower' method.
try:
um = unit_manager
if self.family_name is None:
family_name = ''
else:
family_name = self.family_name.lower()
self.family_name = \
um.get_family_name(family_name) or \
em.get_family_name(name.lower())
# If units were passed in, but don't match the guessed family_name,
# punt.
if not unit_manager.is_compatible( units, self.family_name ):
self.family_name = "unknown"
compatibility_checked = True
except KeyError:
logger.warn("Could not find family name: %s" % \
self.family_name or name)
else:
# fixme: This is subverting the FamilyNameTrait behavior,
# but it gets around proava ticket:1715-comment14,item 2.
self.family_name = traits['family_name']
# If we haven't checked compatibilty before, and units
if (compatibility_checked != True and
not unit_manager.is_compatible( units, self.family_name )):
raise ValueError, "units (%s) not compatible with family_name (%s)" \
% (units.label, self.family_name)
self.units = units
# The following timing data is from using the code below the
# timings that sets values for 'data' and 'units' using the
# 'slow' method.
if isinstance(data, Quantity):
self.data = self._convert(data, units)
else:
self.data = data
# The 'fast' method of just stuffing the __dict__ values yields a
# performance improvement of 2x-- 0.0016 sec vs. 0.0035 sec per
# unit change (which creates a new Quantity object).
#self.__dict__['data'] = self._convert(data, units)
#self.__dict__['units'] = units
return
