解决Python出现_warn_unsafe_extraction问题的方法

/System/Library/Frameworks/Python.framework/Versions/2.7/bin/python /Users/yourtion/Codes/python/knowme/server.py
Traceback (most recent call last):
 File "/Users/yourtion/Codes/python/knowme/server.py", line 5, in 
 from Handler.api import UserHandler
 File "/Users/yourtion/Codes/python/knowme/Handler/api.py", line 3, in 
 from Model.user import User
 File "/Users/yourtion/Codes/python/knowme/Model/user.py", line 2, in 
 from mongoengine import *
 File "build/bdist.macosx-10.9-intel/egg/mongoengine/__init__.py", line 1, in 
 File "build/bdist.macosx-10.9-intel/egg/mongoengine/document.py", line 4, in 
 File "/Library/Python/2.7/site-packages/pymongo-2.6.3-py2.7-macosx-10.8-intel.egg/pymongo/__init__.py", line 80, in 
 File "/Library/Python/2.7/site-packages/pymongo-2.6.3-py2.7-macosx-10.8-intel.egg/pymongo/connection.py", line 39, in 
 File "/Library/Python/2.7/site-packages/pymongo-2.6.3-py2.7-macosx-10.8-intel.egg/pymongo/mongo_client.py", line 44, in 
 File "/Library/Python/2.7/site-packages/pymongo-2.6.3-py2.7-macosx-10.8-intel.egg/bson/__init__.py", line 41, in 
 File "/Library/Python/2.7/site-packages/pymongo-2.6.3-py2.7-macosx-10.8-intel.egg/bson/_cbson.py", line 7, in 
 File "/Library/Python/2.7/site-packages/pymongo-2.6.3-py2.7-macosx-10.8-intel.egg/bson/_cbson.py", line 4, in __bootstrap__
 File "build/bdist.macosx-10.9-intel/egg/pkg_resources.py", line 914, in resource_filename
 %s
 File "build/bdist.macosx-10.9-intel/egg/pkg_resources.py", line 1601, in get_resource_filename
 """Retrieve a PEP 302 "importer" for the given path item
 File "build/bdist.macosx-10.9-intel/egg/pkg_resources.py", line 1629, in _extract_resource
 from pkgutil import get_importer, ImpImporter
 File "build/bdist.macosx-10.9-intel/egg/pkg_resources.py", line 990, in get_cache_path

AttributeError: ResourceManager instance has no attribute '_warn_unsafe_extraction'

Process finished with exit code 1

原文链接：http://blog.yourtion.com/solve-warn_unsafe_extraction.html