How do I find the location of my Python site-packages directory

因為要去複制特定的 python 套件的 source code 出來，每次都記不起來 site-packages 的路徑，原來python 有指令可以顯示 path.

使用指令：

python -m site

python -c 'import site; print(site.getsitepackages())'

There are two types of site-packages directories, global and per user.

Global site-packages (“dist-packages“) directories are listed in sys.path when you run:
python -m site

For a more concise list run getsitepackages from the site module in Python code:
python -c 'import site; print(site.getsitepackages())'

Note: With virtualenvs getsitepackages is not available, sys.path from above will list the virtualenv’s site-packages directory correctly, though. In Python 3, you may use the sysconfig module instead:
python3 -c 'import sysconfig; print(sysconfig.get_paths()["purelib"])'
The per user site-packages directory (PEP 370) is where Python installs your local packages:
python -m site --user-site

If this points to a non-existing directory check the exit status of Python and see python -m site --help for explanations.Hint: Running pip list --user or pip freeze --user gives you a list of all installed per user site-packages.

Practical Tips

<package>.__path__ lets you identify the location(s) of a specific package: (details)$ python -c "import setuptools as _; print(_.__path__)" ['/usr/lib/python2.7/dist-packages/setuptools']
<module>.__file__ lets you identify the location of a specific module: (difference)$ python3 -c "import os as _; print(_.__file__)" /usr/lib/python3.6/os.py
Run pip show <package> to show Debian-style package information:$ pip show pytest Name: pytest Version: 3.8.2 Summary: pytest: simple powerful testing with Python Home-page: https://docs.pytest.org/en/latest/ Author: Holger Krekel, Bruno Oliveira, Ronny Pfannschmidt, Floris Bruynooghe, Brianna Laugher, Florian Bruhin and others Author-email: None License: MIT license Location: /home/peter/.local/lib/python3.4/site-packages Requires: more-itertools, atomicwrites, setuptools, attrs, pathlib2, six, py, pluggy