pySerial question, setting certain serial parameters [newbie]

[Jean Dupont]

I need to set the following options I found in a Perl-script in Python for serial communication with a device (a voltmeter):

$port->handshake("none");
$port->rts_active(0);
$port->dtr_active(1); 

I have thus far the following  statements but I think it does not set the above parameters correctly:
import serial
voltport='/dev/ttyUSB2'
ser2 = serial.Serial(voltport, 2400, 8, serial.PARITY_NONE, 1,timeout=15) 

thanks
Jean