运行python3时，“此软件包在Python 3上不可访问”

Question

在了解可以在Mac上同时使用python和python3之前，我尝试使用virtualenv在python版本之间进行切换。

我能够修复我的python 2.7版本，因此仍然可以正常工作，但是，当我运行python3时，出现此错误：

Failed to import the site module
Traceback (most recent call last):
  File "/usr/local/Cellar/python3/3.6.0/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site.py", line 544, in <module>
main()
  File "/usr/local/Cellar/python3/3.6.0/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site.py", line 530, in main
known_paths = addusersitepackages(known_paths)
  File "/usr/local/Cellar/python3/3.6.0/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site.py", line 282, in addusersitepackages
user_site = getusersitepackages()
  File "/usr/local/Cellar/python3/3.6.0/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site.py", line 258, in getusersitepackages
user_base = getuserbase() # this will also set USER_BASE
  File "/usr/local/Cellar/python3/3.6.0/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site.py", line 248, in getuserbase
USER_BASE = get_config_var('userbase')
  File "/usr/local/Cellar/python3/3.6.0/Frameworks/Python.framework/Versions/3.6/lib/python3.6/sysconfig.py", line 601, in get_config_var
return get_config_vars().get(name)
  File "/usr/local/Cellar/python3/3.6.0/Frameworks/Python.framework/Versions/3.6/lib/python3.6/sysconfig.py", line 580, in get_config_vars
import _osx_support
  File "/usr/local/Cellar/python3/3.6.0/Frameworks/Python.framework/Versions/3.6/lib/python3.6/_osx_support.py", line 4, in <module>
import re
  File "/usr/local/Cellar/python3/3.6.0/Frameworks/Python.framework/Versions/3.6/lib/python3.6/re.py", line 125, in <module>
import functools
  File "/usr/local/Cellar/python3/3.6.0/Frameworks/Python.framework/Versions/3.6/lib/python3.6/functools.py", line 21, in <module>
from collections import namedtuple
  File "/usr/local/Cellar/python3/3.6.0/Frameworks/Python.framework/Versions/3.6/lib/python3.6/collections/__init__.py", line 32, in <module>
from reprlib import recursive_repr as _recursive_repr
  File "/usr/local/lib/python2.7/site-packages/reprlib/__init__.py", line 7, in <module>
raise ImportError('This package should not be accessible on Python 3. '
ImportError: This package should not be accessible on Python 3. Either you are trying to run from the python-future src folder or your installation of python-future is corrupted.

我一直在网上寻找该错误，但大多数对话都是在修补补丁，然后再升级virtualenv。但是，这仍然不能解决我的问题。

python3 -V: Python 3.6.0
virtualenv --version: 15.1.0
env | egrep -i 'python|virtualenv': PYTHONPATH=/usr/local/lib/python2.7/site-packages:

Answer 1

您的环境包含 PYTHONPATH=/usr/local/lib/python2.7/site-packages

出于显而易见的原因，这不适用于Python 3。删除它：

unset PYTHONPATH