pyserial code not working as a saved script

[kishoreinme]

hello there

Iam using python 2.5.4
pyserial 2.4
pywin32-214

on windows 7

i hav a small test script written to query a serial device (arduino)
and get back reply appropriately

////file: test.py

import serial
print 'hi'
ser=serial.Serial(port='\\.\COM2', baudrate=9600)
ser.close()
ser.open()
ser.write('1')
ser.readline()
ser.readline()
ser.close()

the device waits for '1' through its serial interface and print two
lines if it gets '1'

"Some Data found" and "Header received"

the script works on IDLE well when given one line at a time

but when given in command line as python test.py it prints hi and wait
forever

can anyone help?
thanks in advance

[Micseydel]

Use code tags next time.

The issue is that when you're using Python interactively, a function's return value is echoed back, but this isn't the case in a script. You have to explicitly print it.

So, for example, here's an interactive session in IDLE

Code: Select all

>>> x = 7
>>> x
7
>>>


If you put

Code: Select all

x = 7
x


in a script, and run it, you'll get no output. So, to get output, you do this:

Code: Select all

x = 7
print x


(This will also work interactively.)

For your script, you need to change

Code: Select all

ser.readline()
ser.readline()


to

Code: Select all

print ser.readline()
print ser.readline()


[Sneekula]

Also read:
"*** THE "SCRIPTS" FORUM IS FOR FINISHED SCRIPTS ONLY"