This property shows how many bytes were sent after the last assignment to DataToSend .
def get_bytes_sent(connection_id: int) -> int: ...
Note that this property will always return 0 when the class is operating in synchronous mode (that is, the timeout property is set to a positive value.)
The connection_id parameter specifies the index of the item in the array. The size of the array is controlled by the connection_count property.
This property is read-only.