[Tutor] Saving an Image in a Given Format

[Wayne Watson]

I'm pretty new to Python and libraries. I'm actually trying to modify 
some code someone else wrote. There are two ways images are saved. One 
is for the user to select a "Save as GIF" menu item, or save as tiff, or 
others. The other way is that the user wants a collected image from a 
camera saved every, say, 10 minutes. The "save" process is different for 
some reason. Here are the two code segments involved (NOTE my comments 
and questions below B.):

A. Save every 10 minutes
        t = time.localtime(now_time)
        s = "a%4d%02d%02d_%02d%02d%02d.tif" % (  
            t.tm_year, t.tm_mon, t.tm_mday,
            t.tm_hour, t.tm_min, t.tm_sec )
        s = os.path.join("Exposures",s)   <========== auto-exposures
        if not os.path.exists("Exposures"):
            os.mkdir("Exposures")
        self.current_image.save(s)  <============ save image
        if self.trigger_mode:
            self.Trigger()
            self.CheckEvent()


contrast this with where the user specifically wants the image he sees 
saved as a gif:

B. From menu option

def SaveGIF(self):
        if self.current_path:
            default_path = splitext(basename(self.current_path))[0] + 
".gif"
            path = asksaveasfilename(defaultextension=".gif",
                                     title="Save as GIF",
                                     initialfile=default_path,
                                     filetypes=GIF_FILE_TYPES)
        else:
            path = asksaveasfilename(defaultextension=".gif",
                                     title="Save as GIF",
                                     filetypes=GIF_FILE_TYPES)
        if not path:
            return
        gif = self.current_image.convert("RGB")
        gif.save(path) <===========Save as gif.

The programmer told me if I change the tif in A. to gif, jpg or 
whatever, it would work. Instead I get a file the of zero length when I 
use jpg. Can anyone explain why this wouldn't work? I see that 
current_image.convert is involved in one place and current_image.save in 
the first. What module owns these "current" methods?

Hmmm, maybe I needed to use jpeg?

-- 
           Wayne Watson (Watson Adventures, Prop., Nevada City, CA)

             (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
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