pip install progressbar

E:\opensource_codes\semi-auto-anno\src>pip install progressbar
Collecting progressbar
  Downloading 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\mona6\AppData\Local\Temp\pip-build-0_37al8d\progressbar\setup.py", line 5, in <module>
        import progressbar
      File "C:\Users\mona6\AppData\Local\Temp\pip-build-0_37al8d\progressbar\progressbar\__init__.py", line 59, in <module>
        from progressbar.widgets import *
      File "C:\Users\mona6\AppData\Local\Temp\pip-build-0_37al8d\progressbar\progressbar\widgets.py", line 121, in <module>
        class FileTransferSpeed(Widget):
      File "C:\ProgramData\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\mona6\AppData\Local\Temp\pip-build-0_37al8d\progressbar\

E:\opensource_codes\semi-auto-anno\src>pip install progressbar