Write data to channel.

        Args:
            data(bytes): The data to write to the channel.
            echo(bool): Whether to echo the written data to stdout.

        Raises:
            EOFError: If the channel was closed before all data was sent.

def write(self, data, echo=None):
        """
        Write data to channel.

        Args:
            data(bytes): The data to write to the channel.
            echo(bool): Whether to echo the written data to stdout.

        Raises:
            EOFError: If the channel was closed before all data was sent.
        """

        if echo or (echo is None and self.echo):
            sys.stdout.write(data.decode('latin1'))
            sys.stdout.flush()
        self.channel.write(data)