How to use the pysmb.smbc function in pysmb

busy(self.SMBBrowseDialog)
        class X:
            pass
        dummy = X()
        dummy.smbc_type = pysmb.smbc.PRINTER_SHARE
        dummy.name = _('Scanning...')
        dummy.comment = ''
        store.append(None, [dummy])
        while gtk.events_pending ():
            gtk.main_iteration ()

        debug = 0
        if get_debugging ():
            debug = 10
        smbc_auth = pysmb.AuthContext (self.SMBBrowseDialog)
        ctx = pysmb.smbc.Context (debug=debug,
                                  auth_fn=smbc_auth.callback)
        entries = None
        try:
            while smbc_auth.perform_authentication () > 0:
                try:
                    entries = ctx.opendir ("smb://").getdents ()
                except Exception, e:
                    smbc_auth.failed (e)
        except RuntimeError, (e, s):
            if e != errno.ENOENT:
                debugprint ("Runtime error: %s" % repr ((e, s)))
        except:
            nonfatalException ()

        store.clear ()
        if entries:

try:
                        entries = ctx.opendir (uri).getdents ()
                    except Exception, e:
                        smbc_auth.failed (e)
            except RuntimeError, (e, s):
                if e != errno.ENOENT:
                    debugprint ("Runtime error: %s" % repr ((e, s)))
            except:
                nonfatalException()

            while model.iter_has_child (iter):
                i = model.iter_nth_child (iter, 0)
                model.remove (i)

            for entry in entries:
                if entry.smbc_type in [pysmb.smbc.SERVER,
                                       pysmb.smbc.PRINTER_SHARE]:
                    i = model.append (iter, [entry])
                if entry.smbc_type == pysmb.smbc.SERVER:
                    n = model.append (i)

            view.expand_row (path, 0)
            del self.expanding_row
            ready (self.SMBBrowseDialog)

        elif entry.smbc_type == pysmb.smbc.SERVER:
            # Server
            try:
                if self.expanding_row:
                    return
            except:
                self.expanding_row = 1