variables within variables

[lars at stea.nu]

I'm writing a script for burning CD's

I vant to set some variables like:

cddev = /dev/cdrom
cdrdev = 0,1,0
speed = input("Enter speed: ")

and then create a new variable like:

cdcopy = "cdrecord - v speed=",speed , "dev=",cdrdev, "-isoimage", cddev

I've done this with def cdrecord(speed,cdrdev,cddev) and so forth.

I can then print :

print cdcopy

but the word "Null" is appended to the end of the line.

Then it doesn't work to execute:

posix.system(cdrecord).

Can anyone please explain a way to do this?

Lars at stea.nu

www.stea.nu