Python安装progressbar遇到的问题及解决

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本文介绍了在使用Anaconda或pip安装progressbar遇到与Python版本冲突的问题及其解决方案。由于原progressbar不支持Python 3.5，建议安装progressbar2以适配更高版本的Python。

部署运行你感兴趣的模型镜像

progressbar可以显示程序运行的进度，我主要用在jupyter notebook里。

在用Anaconda安装progressbar的时候，出现了这样的错误，提示progressbar是Python2.6使用的，Python3.5装不了。

UnsatisfiableError: The following specifications were found to be in conflict:
  - progressbar -> python 2.6*
  - python 3.5*
Use "conda info <package>" to see the dependencies for each package.

用pip install progressbar则出现这样的错误：

Collecting progressbar
  Using cached https://files.pythonhosted.org/packages/0f/e1/f30b72ecabba259c7c38dd0eb944a173effced3fd7de2c9c2902bd6f649a/progressbar-2.3.tar.gz
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "C:\Users\ADMINI~1\AppData\Local\Temp\pip-build-i8m36ug8\progressbar\setup.py", line 5, in <module>
        import progressbar
      File "C:\Users\ADMINI~1\AppData\Local\Temp\pip-build-i8m36ug8\progressbar\progressbar\__init__.py", line 59, in <module>
        from progressbar.widgets import *
      File "C:\Users\ADMINI~1\AppData\Local\Temp\pip-build-i8m36ug8\progressbar\progressbar\widgets.py", line 121, in <module>
        class FileTransferSpeed(Widget):
      File "C:\Program Files\Anaconda3\lib\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 C:\Users\ADMINI~1\AppData\Local\Temp\pip-build-i8m36ug8\progressbar\