Uncompress all streams from a PDF file

import sys
import zlib

fn = sys.argv[1]
fd = open(sys.argv[1], "r")
fbin = fd.read()

while len(fbin) > 0:
    foffss = str.find(fbin, "stream")
    foffse = str.find(fbin, "endstream")
    #print "From " + str(foffss) + " to " + str(foffse) + "\n"

    if ((foffss >= 0) and (foffse >= 0)):
        fslice = fbin[(foffss + 7) : foffse]

        try:
            ftxt = zlib.decompress(fslice)
        except:
            ftxt = ""

        print ftxt
        fbin = fbin[(foffse + 10) : ]
    else:
        fbin = ""