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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 add_attribute_to_current_span(self, attribute_key, attribute_value):
 """Add attribute to current span. :type attribute_key: str :param attribute_key: Attribute key. :type attribute_value:str :param attribute_value: Attribute value. """

        current_span = self.current_span()
        current_span.add_attribute(attribute_key, attribute_value)