def extend(self, iterable):
        """Extend the headers with a dict or an iterable yielding keys and
        values.
        """
        if isinstance(iterable, dict):
            for key, value in iteritems(iterable):
                if isinstance(value, (tuple, list)):
                    for v in value:
                        self.add(key, v)
                else:
                    self.add(key, value)
        else:
            for key, value in iterable:
                self.add(key, value)
Extend the headers with a dict or an iterable yielding keys and
        values.
        
Solutions/CyberArkAudit/Data Connectors/.python_packages/lib/site-packages/azure/functions/_thirdparty/werkzeug/datastructures.py