python 3.10 fix

[veszig]

Minor fix for a python 3.10 issue: Sequence was moved from collections to collections.abc, so an import has to be changed.

[slanderaan]

@veszig I forked this due to experiencing this issue as well. I'd suggest that we add a conditional import so that this works with previous versions.

if sys.version_info > (version_number,):
    import module1
else:
    import module2