parameters: (self, attr)
docstring: A <stream:stream> opening tag has been received.
docstring_summary: A <stream:stream> opening tag has been received.
docstring_tokens: A <stream : stream > opening tag has been received .
function: def handle_open_stream(self, attr):
          """A <stream:stream> opening tag has been received."""
function_tokens: def handle_open_stream ( self , attr ) :