So i've found this HTTP downloader in python, and I wanted to modify it. I've been trying to add a ttk progressbar, to no avail, but I have no idea why it isn't working!
Here is my code:

import urllib2
import Tkinter
import ttk 


url = 'http://kharg.czystybeton.pl/pendulum%20-%20%5B2005%5D%20hold%20your%20colour/05.%20through%20the%20loop.mp3'


file_name = url.split('/')[-1]
u = urllib2.urlopen(url)
f = open(file_name, 'wb')
meta = u.info()
file_size = int(meta.getheaders("Content-Length")[0])
print "Downloading: %s Bytes: %s" % (file_name, file_size)

global file_size_dl

file_size_dl = 0
block_sz = 8192
while True:
    buffer = u.read(block_sz)
    if not buffer:
        break

    file_size_dl += len(buffer)
    f.write(buffer)

f.close()

root = Tk()
root.title('Downloading... ' + file_name)
progressbar = ttk.Progressbar(orient=HORIZONTAL, length=500, mode='determinate', variable=file_size_dl, maximum=file_size)
progressbar.pack(side="top")
progressbar.start()

root.mainloop()

Any ideas? Thanks!

I do not understand why you have global declaration even you have not any functions, and why are you starting progress bar after finishing transfer and closing the transfered file?

Thanks Tony, I'm pretty new to python, as you can probably tell.
Here is my new code:

import urllib2
from Tkinter import *
import ttk 


url = 'http://kharg.czystybeton.pl/pendulum%20-%20%5B2005%5D%20hold%20your%20colour/05.%20through%20the%20loop.mp3'


file_name = url.split('/')[-1]
u = urllib2.urlopen(url)
f = open(file_name, 'wb')
meta = u.info()
file_size = int(meta.getheaders("Content-Length")[0])
print "Downloading: %s Bytes: %s" % (file_name, file_size)

def file_size_dl():
    global file_size_dl
    file_size_dl = 0
    block_sz = 8192
    while True:
        buffer = u.read(block_sz)
        if not buffer:
            break

        file_size_dl += len(buffer)
        f.write(buffer)

root = Tk()
root.title('Downloading... ' + file_name)
progressbar = ttk.Progressbar(orient=HORIZONTAL, length=1000, mode='determinate', value=file_size_dl, variable=file_size_dl, maximum=file_size)
progressbar.pack(side="top")
progressbar.start()

root.mainloop()

f.close()

But now I get the error:
TclError: expected floating-point number but got "35273104file_size_dl"
I don't know how to resolve this... Help?

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