问题
Below is my setup.py. I don't use anything from setuptools in my code and my project has no external dependencies
#!/usr/bin/env python
from distutils.core import setup
setup(name='dots',
...
packages=['dots','dots.configs','dots.management','dots.utils','dots.test'],
scripts=['dots/dots.py']
)
When I run python setup.py install, I get the following
running install
running build
running build_py
running build_scripts
running install_lib
running install_scripts
changing mode of /Users/kevinlin/.virtualenvs/p-dots/bin/dots.py to 755
running install_egg_info <- why?
Removing /Users/kevinlin/.virtualenvs/p-dots/lib/python2.7/site-packages/dots-0.1-py2.7.egg-info
Writing /Users/kevinlin/.virtualenvs/p-dots/lib/python2.7/site-packages/dots-0.1-py2.7.egg-info
(p-dots)Kevins-MacBook-Pro-2% python setup.py install
running install
running build
running build_py
running build_scripts
running install_lib
running install_scripts
changing mode of /Users/kevinlin/.virtualenvs/p-dots/bin/dots.py to 755
running install_egg_info
Removing /Users/kevinlin/.virtualenvs/p-dots/lib/python2.7/site-packages/dots-0.1-py2.7.egg-info
Writing /Users/kevinlin/.virtualenvs/p-dots/lib/python2.7/site-packages/dots-0.1-py2.7.egg-info
I notice that an .egg-info file is installed
ls -dl /Users/kevinlin/.virtualenvs/p-dots/lib/python2.7/site-packages/dots*
drwxr-xr-x 10 kevinlin staff 340 May 4 11:36 /Users/kevinlin/.virtualenvs/p-dots/lib/python2.7/site-packages/dots
-rw-r--r-- 1 kevinlin staff 205 May 4 11:36 /Users/kevinlin/.virtualenvs/p-dots/lib/python2.7/site-packages/dots-0.1-py2.7.egg-info
Why?
回答1:
There was discussion about adding setuptools to the stdlib for Python 2.5, and then about adding only pkg_resource (one part of setuptools). Various reasons made that not happen. The core devs recognized that setuptools was an important third-party tool, and accepted a change to make projects installed with a pure-distutils setup.py write this egg-info file, to enable setuptools and tools built on top of it to know that these projects are already installed.
Changeset: http://hg.python.org/cpython/rev/93344da76acd
Ticket: http://bugs.python.org/issue1459476
(I haven’t checked the dates of the 2.5 discussions about setuptools, so my first sentences may be wrong. The rationale is still valid, see the ticket.)
来源：https://stackoverflow.com/questions/23460191/why-is-an-egg-info-file-created-when-im-using-distutils