'Returns a Tag for the passed name, associated with this API object. If you know the count value for this tag,
pass it to update the object. There is no way to query the count directly from the API, but it can be retrieved
from other calls such as \'artist\', however.'

def get_tag(self, name):

    if (name in self.cached_tags.keys()):
        return self.cached_tags[name]
    else:
        return Tag(name, self)
