pip安装失败,__slots__中的"ValueError:'format'与类变量冲突"

Question

当试图progressbar在OSX El Capitan上安装python包时,我收到以下错误:

Collecting progressbar
  Using cached progressbar-2.3.tar.gz
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):
      File "<string>", line 20, in <module>
      File "/private/var/folders/9s/b1jly7yd0jq639plvkzdvn4m0000gn/T/pip-build-xhfxywsw/progressbar/setup.py", line 5, in <module>
        import progressbar
      File "/private/var/folders/9s/b1jly7yd0jq639plvkzdvn4m0000gn/T/pip-build-xhfxywsw/progressbar/progressbar/__init__.py", line 59, in <module>
        from progressbar.widgets import *
      File "/private/var/folders/9s/b1jly7yd0jq639plvkzdvn4m0000gn/T/pip-build-xhfxywsw/progressbar/progressbar/widgets.py", line 121, in <module>
        class FileTransferSpeed(Widget):
      File "/Users/<USERNAME>/anaconda/lib/python3.4/abc.py", line 133, in __new__
        cls = super().__new__(mcls, name, bases, namespace)
    ValueError: 'format' in __slots__ conflicts with class variable

----------------------------------------
    Command "python setup.py egg_info" failed with error code 1 in /private/var/folders/9s/b1jly7yd0jq639plvkzdvn4m0000gn/T/pip-build-xhfxywsw/progressbar

更新以下内容并没有解决我的问题

pip install --upgrade setuptools
pip install --upgrade Distribute

我怎么解决这个问题？

Answer 1

原始软件包不适用于python3,但是,有一个fork,你可以从https://github.com/coagulant/progressbar-python3.git克隆它并运行

python3 setup.py install

但是,我不会检查功能本身是否有效,所以YMMV,但它至少安装:)

[编辑]

更新@shadi 2017年1月30日:关于progressbar的github repo的第28期说要使用pip3 install progressbar33,谢谢!