python - __slots__ 中的 pip 安装失败，格式为 "ValueError: ' 与类变量冲突”

Question

尝试在 OSX El Capitan 上安装 python 包 progressbar 时，出现以下错误:

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

更新以下并没有解决我的问题

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

我该如何解决？

Answer 1

原始包不适用于 python3，但是，有一个分支可以，您可以从 https://github.com/coagulant/progressbar-python3.git 克隆它并运行

python3 setup.py install

但是，我没有检查该功能本身是否有效，所以 YMMV，但它至少安装了 :)

[编辑]

@shadi 于 2017 年 1 月 30 日更新:Issue 28在 progressbar 的 github repo 上说要使用 pip3 install progressbar33，谢谢!