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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def from_dict(cls, tag=None):
 """ Create new Tag-object from dict. Suitable for creating objects from XML-RPC data. All available keys must exist. """


        if tag is None:
            tag = {}

        l = Tag()
        l.name = tag['name']
        return l