'Usage: extract <remotepath> <subpath> [<saveaspath>]'

def extract(self, remotepath, subpath, saveaspath=None):

    rpath = get_pcs_path(remotepath)
    topath = get_pcs_path(saveaspath)
    if (not saveaspath):
        topath = ((os.path.dirname(rpath) + u'/') + subpath)
    return self.__panapi_unzipcopy_file(rpath, subpath, topath)
