向他一样rap: 不行哦 ， 执行jupyter contrib nbextension install --user 出现： usage: jupyter [-h] [--version] [--config-dir] [--data-dir] [--runtime-dir] [--paths] [--json] [--debug] [subcommand] Jupyter: Interactive Computing positional arguments: subcommand the subcommand to launch options: -h, --help show this help message and exit --version show the versions of core jupyter packages and exit --config-dir show Jupyter config dir --data-dir show Jupyter data dir --runtime-dir show Jupyter runtime dir --paths show all Jupyter paths. Add --json for machine-readable format. --json output paths as machine-readable json --debug output debug information about paths Available subcommands: bundlerextension console dejavu execute kernel kernelspec lab labextension labhub migrate nbclassic nbconvert nbextension notebook qtconsole run script server serverextension troubleshoot trust Jupyter command `jupyter-contrib` not found.