python - Unpacking dictionary into model -

when unpacking ** need have same arguments constructor?

what mean is, if have additional item in dictionary, should ignored, need pop item? trying unpack everything, , expecting item excluded, getting error:

  __init__() got unexpected keyword argument 

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nagative = negativesentimentanalysis(**negative_items) 

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class negativesentimentanalysis(db.model):     id = db.column(db.integer, primary_key=true)     sentiment = db.column(db.string(500))     topic = db.column(db.string(500))      def __init__(self, sentiment=none, topic=none):         self.sentiment = user_id         self.topic = topic 

you can have __init__ accept keyword arguments:

    def __init__(self, sentiment=none, topic=none, **kw): 

this cause leftover arguments collected in kw method can ignore. however, comes caveat may have other code construct object may need fail.

alternatively filter out arguments noted in other answer.