python3+windows. How to get rid of errors when installing packages from pip?

Question

Python

Good afternoon.
Installed Python on Windows. Latest available installer. Default.
When I try to install a module in pip, I get this error:

pip install progressbar

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 1, in <module>
      File "C:\Users\Andrw\AppData\Local\Temp\pip-build-669k16kc\progressbar\setup.py", line 5, in <module>
        import progressbar
      File "C:\Users\Andrw\AppData\Local\Temp\pip-build-669k16kc\progressbar\progressbar\__init__.py", line 59, in <module>
        from progressbar.widgets import *
      File "C:\Users\Andrw\AppData\Local\Temp\pip-build-669k16kc\progressbar\progressbar\widgets.py", line 121, in <module>
        class FileTransferSpeed(Widget):
      File "c:\users\Andrw\appdata\local\programs\python\python36-32\lib\abc.py", line 133, in __new__
        cls = super().__new__(mcls, name, bases, namespace, **kwargs)
    ValueError: 'format' in __slots__ conflicts with class variable

    ----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in C:\Users\Andrw\AppData\Local\Temp\pip-build-669k16kc\progressbar\

Please tell me the solution of the problem .. Has anyone come across? .. Thanks