parameters: (self,data)
docstring: Override in subclass to buffer data for send to client
  
          It's okay if this method actually transmits the data; BaseHandler
          just separates write and flush operations for greater efficiency
          when the underlying system actually has such a distinction.
docstring_summary: Override in subclass to buffer data for send to client
docstring_tokens: Override in subclass to buffer data for send to client
function: def _write(self,data):
          """Override in subclass to buffer data for send to client
  
          It's okay if this method actually transmits the data; BaseHandler
          just separates write and flush operations for greater efficiency
          when the underlying system actually has such a distinction.
          """
          raise NotImplementedError
function_tokens: def _write ( self , data ) : raise NotImplementedError