Terry J. Reedy added the comment: Upendra, with respect to the error installing timingwheel, msg268983, that looks like a bug in timingwheel. Report it to the pip or timingwheel list or tracker. I ran the command normally and got the same exception, with less noise. It is not a problem with using main.
C:\Programs\Python36>python -m pip install -U timingwheel Collecting timingwheel Downloading timingwheel-0.4.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\Terry\AppData\Local\Temp\pip-build-ypf8yppj\timingwheel\setup.py", line 3, in <module> from timingwheel import version File "C:\Users\Terry\AppData\Local\Temp\pip-build-ypf8yppj\timingwheel\timingwheel\__init__.py", line 1, in <module> from timingwheel import BaseWheel, TimingWheel ImportError: cannot import name 'BaseWheel' ---------------------------------------- Command "python setup.py egg_info" failed with error code 1 in C:\Users\Terry\AppData\Local\Temp\pip-build-ypf8yppj\timingwheel\ ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue27051> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com