"Roel Schroeven" <r...@roelschroeven.net> wrote in message news:mailman.1618.1340910525.4697.python-l...@python.org... > Temia Eszteri schreef: >> Actually, I believe someone in an earlier thread in the newsgroup or >> elsewhere pointed out that serial ports automatically open under >> Windows. I'd have to look it back up when I have the time, which I >> don't have at the moment, unfortunately. > > That doesn't have anything to do with Windows, but with how pySerial > works. See the documentation for __init__(): > > "The port is immediately opened on object creation, when a port is given. > It is not opened when port is None and a successive call to open() will be > needed." > > So if your script does something like > > prt = serial.Serial('COM4') > > then pySerial automatically opens the port, and you shouldn't call > prt.open() anymore. > > If, on the contrary, you do something like > > prt = serial.Serial() > prt.port = 'COM4' > > then pySerial doesn't open the port, and you have to call prt.open() to do > it. > > PySerial has this same behavior on both Windows and Linux. The difference > might be that on Linux it is possible to open serial ports more than once, > while that doesn't work on Windows. > > Best regards, > Roel >
Thanks for the info. Your explanation helps a lot. -- http://mail.python.org/mailman/listinfo/python-list
