ubuntu 12.04上的pip3-语法错误

Question

我已经通过键入以下命令在Ubuntu 12.04上安装了pip3：

sudo apt-get install python3-setuptools

sudo easy_install3 pip

结果，我得到：

Searching for pip
Best match: pip 9.0.1
Processing pip-9.0.1-py3.2.egg
pip 9.0.1 is already the active version in easy-install.pth
Installing pip script to /usr/local/bin
Installing pip3.2 script to /usr/local/bin
Installing pip3 script to /usr/local/bin

Using /usr/local/lib/python3.2/dist-packages/pip-9.0.1-py3.2.egg
Processing dependencies for pip
Finished processing dependencies for pip

但是当我键入：

pip3 --version

然后我收到此错误消息：

Traceback (most recent call last):
  File "/usr/local/bin/pip3", line 9, in <module>
    load_entry_point('pip==9.0.1', 'console_scripts', 'pip3')()
  File "/usr/lib/python3/dist-packages/pkg_resources.py", line 337, in load_entry_point
    return get_distribution(dist).load_entry_point(group, name)
  File "/usr/lib/python3/dist-packages/pkg_resources.py", line 2280, in load_entry_point
    return ep.load()
  File "/usr/lib/python3/dist-packages/pkg_resources.py", line 1990, in load
    entry = __import__(self.module_name, globals(),globals(), ['__name__'])
  File "/usr/local/lib/python3.2/dist-packages/pip-9.0.1-py3.2.egg/pip/__init__.py", line 21, in <module>
    from pip._vendor.requests.packages.urllib3.exceptions import DependencyWarning
  File "/usr/local/lib/python3.2/dist-packages/pip-9.0.1-py3.2.egg/pip/_vendor/requests/__init__.py", line 66, in <module>
    from .models import Request, Response, PreparedRequest
  File "/usr/local/lib/python3.2/dist-packages/pip-9.0.1-py3.2.egg/pip/_vendor/requests/models.py", line 856
    http_error_msg = u'%s Client Error: %s for url: %s' % (self.status_code, reason, self.url)
                                                      ^
SyntaxError: invalid syntax

那么，为什么我有这个语法错误？ 当我尝试使用pip3安装某些软件包时，也会得到该提示。

注意：我安装了以下python版本：

$ python --version
Python 2.7.3

$ python3 --version
Python 3.2.3

最好的祝福，

Answer 1

尝试：

sudo apt-get update
sudo apt-get upgrade
sudo apt-get install python3-pip
pip3 --version