为什么在安装软件包时有时会创建.pth文件？

Question

Sometime, when I install a package, I can notice that a .pth file has been created in the site-packages dir just at the same level as the package code. For example, if I do a

pip install DjangoDevKit

I can see in site-packages directory :

djangodevkit                        (a directory)
DjangoDevKit-1.0.7.dist-info        (a directory)
DjangoDevKit-1.0.7-py3.5-nspkg.pth

The .pth file contains:

import sys, types, os;p = os.path.join(sys._getframe(1).f_locals['sitedir'], *('djangodevkit',));ie = os.path.exists(os.path.join(p,'__init__.py'));m = not ie and sys.modules.setdefault('djangodevkit', types.ModuleType('djangodevkit'));mp = (m or []) and m.__dict__.setdefault('__path__',[]);(p not in mp) and mp.append(p)

How this DjangoDevKit-1.0.7-py3.5-nspkg.pth has been created ? The setup.py does not tell to create such a .pth file. I searched into the code but there is nothing obvious.

Do you have an idea ?

Answer 1

DjangoDevKit is a namespace package . That's why setuptools created *_nspkg.pth .

See https://stackoverflow.com/search?q=%5Bpython%5D+namespace+package