filecut for windows

import compressor,sys,os
usg ="""usage:
python filecut.py <path> <blocksize>

example: python filecut.py example.jpg 6
"""

try:
    opened = sys.argv[1]
except:
    print usg
    os.system("pause")
    sys.exit(0)
try:
    lev = sys.argv[2]
    lev = int(lev)
    display = False
except ValueError:
    sys.exit(0)
except:
    display = True

levels = {
1:1024,
2:2048,
3:4096,
4:8192,
5:16384,
6:32768,
7:65536,
8:131072,
9:262144,
10:524288
}

if display: #if accessed through command line or by dragging.

    for i in levels:
        print str(i),":",str(levels[i])

    choose = raw_input("\nChoose block size (1 through 10)\n")

    def begin(obj):

        try:
            obj = int(obj) #if not a number, error
            if obj not in range(1,11):
                raise ValueError, "Not a valid choice" #if not 1 through 10, error
            return obj
        except ValueError:
            print "\nInvalid input!\n"
            os.system("pause")
            sys.exit(0)
    amount = levels[begin(choose)]
else:
    amount = levels[lev]

data = open(opened, "rb").read().encode("base64")
blocksize = amount
cuts = [data[i:i+blocksize] for i in range(0, len(data), blocksize)]

for i in cuts:
    filename = str(hex(cuts.index(i)))+".txt"
    with open(filename,'wb') as out:
        out.write(i)
        out.close()

    compressor.compress(filename,filename) #compress the file (Reduces size about 30% usually)