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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_array(array):
 """ Deserialize a new LabeledPrice from a given dictionary. :return: new LabeledPrice instance. :rtype: LabeledPrice """

        if array is None or not array:
            return None
        # end if
        assert_type_or_raise(array, dict, parameter_name="array")

        data = {}
        data['label'] = u(array.get('label'))
        data['amount'] = int(array.get('amount'))
        
        instance = LabeledPrice(**data)
        instance._raw = array
        return instance