lifecycle.py 文件源码

def install():
    """Register `rlipython` as the default interactive interface for IPython.

    When you run this inside IPython, the preference gets applied to the
    current IPython profile. When run using plain Python, the preference gets
    applied to the default profile.

    Run `uninstall()` if you ever change your mind and want to revert to the
    default IPython behavior.
    """
    if ipython_version < (5,4):
        print("`rliptyhon` will only work with IPython 5.4. or above. Aborting")
        return

    cfg, json_path = get_config()

    installed = cfg.get(app_key, {}).get(shell_key) == rl_config

    if installed:
        print ("Looks like rlipython is already installed.")
        return

    if get_ipython() is None:
        log.warning(DEFAULT_WARNING + json_path)

    with open(json_path, 'w') as f:
        cfg.update({app_key: {shell_key: rl_config}})
        json.dump(cfg, f)

    print("Installation succeeded: enjoy rlipython the next time you run ipython!")

    if sys.platform == "darwin" and sys.version_info[:2] >= (3, 6):
        print(OSX_PY36_GNUREADLINE_WARNING)