def add_path_first(path):
    sys.path = [path] + [p for p in sys.path if (
        not p is not path and not p == (path + '/'))]
    if not global_settings.web2py_runtime_gae:
        site.addsitedir(path)
dataset/ETHPy150Open uwdata/termite-data-server/web2py/gluon/admin.py/add_path_first/operator `==` -> `is not`