Hello everyone,
I've got a question about class design. I want to model classes like
these (examples):
#####################################################################
class BaseItem(object):
def __init__(self, ident, name, description):
self.ident = ident
self.name = name
self.description = description
class DataSourceItem(object):
def __init__(self, ident, name, description, data_source):
self.ident = ident
self.name = name
self.description = description
self.data_source = data_source
class BaseItemCollection(list):
def __init__(self, ident, name, description):
self.ident = ident
self.name = name
self.description = description
def default_version(self):
return self[-1]
class BaseDataSourceItemCollection(list):
def __init__(self, ident, name, description, data_source):
self.ident = ident
self.name = name
self.description = description
self.data_source = data_source
def default_version(self):
return self[-1]
#######################################################################
Now, to remove all the duplicated code I could use inheritance. But that
would lead to multiple inheritance and the question how to initialise
both superclasses?
I would appreciate some advice about how to model classes like this.
Personaly, I don't have to use inheritance, but I have no better idea.
Would you accept at least some duplication to avoid multiple inheritance?
Thanks in advance,
Jan
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