import zipfile
import os,stat
from cStringIO import StringIO
 
def createZip(path):
 
    def walktree (top = ".", depthfirst = True):
        names = os.listdir(top)
        if not depthfirst:
            yield top, names
        for name in names:
            try:
                st = os.lstat(os.path.join(top, name))
            except os.error:
                continue
            if stat.S_ISDIR(st.st_mode):
                for (newtop, children) in walktree (os.path.join(top, name),
                                                    depthfirst):
                    yield newtop, children
        if depthfirst:
            yield top, names
 
    list=[]
    for (basepath, children) in walktree(path,False):
          for child in children:
              f=os.path.join(basepath,child)
              if os.path.isfile(f):
                    f = f.encode(sys.getfilesystemencoding())
                    list.append( f )
 
    f=StringIO()
    file = zipfile.ZipFile(f, "w")
    for fname in list:
        nfname=os.path.join(os.path.basename(path),fname[len(path)+1:])
        file.write(fname, nfname , zipfile.ZIP_DEFLATED)
    file.close()
 
    f.seek(0)
    return f