On 06/28/2010 06:08 PM, Dave Pawson wrote: > Thanks for the replies (and Benjamin). > Not met with the subprocess idea. > > On 28 June 2010 16:29, D'Arcy J.M. Cain <da...@druid.net> wrote: > >>> Main queries are: >>> Ease of calling out to bash to use something like imageMagick or Java? >> >> You don't need to call bash to call an external program. Check out the >> subprocess module. > > Will do. > > If you do need a shell to simplify calling a >> program (environment and wild card expansione.g.) don't call bash. > > I can get what I want from Python. No envars needed. > > > >>> Ease of grabbing return parameters? E.g. convert can return both >>> height and width of an image. Can this be returned to the Python program? >> >> Just to set the terminology straight, a parameter is what you call the >> function with. The return value is what it returns. The program >> output is what it emits (prints.) > > My bad. I mean return values, though I do want > program out from (for example) identify
If you're working with images, have a look at the PIL (Python Imaging Library). > > >> >> Programs return an integer value. This is also called the exit >> status. > > Sheer greed, for identify I may get either a return value or an exit > status (bad input etc) :-) > Looks like subprocess can hack it though. > >> >> What you want is the output of the program. For this you need to >> capture the output and parse it. >> >> Look at the subprocess module. > > Will do. > tks D'Arcy (and Benjamin) > > > > > -- http://mail.python.org/mailman/listinfo/python-list
