当我使用“get-pip.py”安装pip时出现“AttributeError”

Question

我尝试在新计算机上安装pip-install。我使用'python get-pip.py'并报告错误“AttributeError：'module'对象没有属性'packaging'”。它看起来像setuptools有问题。怎么解决这个问题？

1. python版本：2.7
2. 系统：ubuntu 14.10

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Traceback (most recent call last):
  File "get-pip.py", line 20206, in <module>
    main() 
  File "get-pip.py", line 154, in main
    bootstrap(tmpdir=tmpdir)
  File "get-pip.py", line 112, in bootstrap
    import setuptools  # noqa
  File "build/bdist.linux-i686/egg/setuptools/__init__.py", line 11, in <module>
  File "build/bdist.linux-i686/egg/setuptools/extension.py", line 8, in <module> 
  File "build/bdist.linux-i686/egg/setuptools/dist.py", line 21, in <module>
AttributeError: 'module' object has no attribute 'packaging'