def select(self,
attribute,
value,
reference=REF["IDENTIFIER_FIRST"],
index_current=0):
if (hasattr(self, attribute)
and ((getattr(self, attribute) == value) or
(attribute == 'dfname'
and getattr(self, attribute).startswith(value)))):
return self
return DF.select(self, attribute, value, reference, index_current)
