def create_value(self, label, vtype=None, lang=None, description=None, unit=None, data=None):
"""
If vtype is not specified then the value (lang, description & unit are ignored)
data can be specified on it's own
"""
label = Validation.label_check_convert(label)
if vtype is not None:
vtype = Validation.value_type_check_convert(vtype)
lang = Validation.lang_check_convert(lang, allow_none=True)
description = Validation.comment_check_convert(description, allow_none=True)
unit = unit
if vtype is None and data is None:
raise AttributeError("create_value with no vtype and no data!")
with self.lock:
try:
value = self.__values[label]
except KeyError:
value = self.__values[label] = {}
if vtype is not None:
new_value = {VTYPE: vtype,
LANG: lang,
DESCRIPTION: description,
UNIT: unit}
if new_value != value:
value.update(new_value)
if VALUE + label not in self._changes:
logger.debug('Value %s has changed', label)
self._changes.append(VALUE + label)
if data is not None:
value[SHAREDATA] = data
if VALUESHARE + label not in self._changes:
logger.debug('Sharing value data for %s', label)
self._changes.append(VALUESHARE + label)
