If you don't have a
tox.ini in your current directory, you can run
tox --version, but when you do
It should not be necessary to have a
tox.ini installed just to look at the commandline help (which always exits), and preferably it should not be necessary for any other options that don't depend on information in the
tox.ini file either (but for that tox would have to know about what
each plugin expects).
I noticed this when invoking
tox --scan PATTERN1 PATTERN2 from
winpysetup.exe, I had to make an empty
tox.ini in the current directory first (and remove it) if not there.