def recv_stderr_ready(self):
return self.in_stderr_buffer.read_ready()<EOL>
Returns true if data is buffered and ready to be read from this
channel's stderr stream.  Only channels using L{exec_command} or
L{invoke_shell} without a pty will ever have data on the stderr
stream.

@return: C{True} if a L{recv_stderr} call on this channel would
    immediately return at least one byte; C{False} otherwise.
@rtype: boolean

@since: 1.1