以安装jieba库为例

调出终端terminal->输入代码sudu python3 -m pip jieba->等待下载即可

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➜ ~ sudo python3 -m pip install jieba
Password:
WARNING: The directory '/Users/apple/Library/Caches/pip' or its parent directory is not owned or is not writable by the current user. The cache has been disabled. Check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
Collecting jieba
Downloading jieba-0.42.1.tar.gz (19.2 MB)
|████████████████████████████████| 19.2 MB 182 kB/s
Building wheels for collected packages: jieba
Building wheel for jieba (setup.py) ... done
Created wheel for jieba: filename=jieba-0.42.1-py3-none-any.whl size=19314478 sha256=c35447e5c42cce8f379bce83f6966bd595873997cd99839d82dad0f3b8f14f8a
Stored in directory: /private/tmp/pip-ephem-wheel-cache-wkdqzjiz/wheels/24/aa/17/5bc7c72e9a37990a9620cc3aad0acad1564dcff6dbc2359de3
Successfully built jieba
Installing collected packages: jieba
Successfully installed jieba-0.42.1