Matt- Have you tried running this line-by-line in IDLE? I've done a script
almost exactly the same as what you're doing ( I downloaded a .jpg file from
a web-server ), and when I was trying to learn what commands did what, I
quickly changed from trying to write a 'program' to running lines
individually in IDLE so I could print out the results of each command, and
to see exactly what lines 'work', which have syntax errors and which have
logic errors.
People often want a compiler which spits out executables, but I realized
it's nice to be able to type a few lines of an algorithm into the
interpreter and see the results, so I can see if I get the results I expect,
then copy that and paste it into my 'program'.
-Dave
Now, for wxPython (a windowing superset of python), my routine was:
---SNIP---
WebImage = urllib2.urlopen("%s/jpg/fullsize.jpg" %netCamAddress)
rawJpg = WebImage.read()
photostream = cStringIO.StringIO(rawJpg)
photoJpg = wx.ImageFromStream(photostream)
photoBmp = wxBitmapFromImage(photoJpg)
liveVideo.SetBitmap(photoBmp)
---SNIP---
"Give a man a fish; you have fed him for today. Teach a man to fish; and
you have fed him for a lifetime. Show a man what a fish looks like so he
doesn't try to eat a tire he fishes out of the pond."
So, let me show you what a "fish" looks like. I expect the first two lines
are of use to you, where the bottom-four lines are specific to wxPython.
Realize what is happening with the string in the first line? I'm replacing
part of the web-address with the contents of the variable netCamAddress.
Can you figure out how that is working? hint- you can try printing
"%s/jpg/fullsize.jpg" %netCamAddress directly in IDLE after setting
netCamAddress to a string value to see what the result is, so you know what
urllib2 is opening ....
After line two is executed, the contents of rawJpg is the .jpg file I
downloaded. Do you know what to do next? Maybe open a file in binary mode,
and write rawJpg' to the file then close it?
Also, do you realize I'm using a different library for urlopen than you
used? Do you know which one, and how to import it?
Lastly, there are a couple ways you can specify your file in python.
"D:\\Temp\\file"
but I like using raw strings.
r"d:\directory\file.ext"
(I hate double-slashing. It's so visually messy, it makes it easy to miss
things like commas I think...)
http://docs.python.org/tut/node9.html#SECTION009200000000000000000
Maybe sections 7.2 and 7.2.1 are relevent to the rest of your goals?
-Dave
_______________________________________________
Tutor maillist - Tutor@python.org
http://mail.python.org/mailman/listinfo/tutor
