Py2 compat: add conditional dep

Rambatino / CHAID

A python implementation of the common CHAID algorithm

Apache License 2.0

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Closed mjpieters closed 4 years ago

mjpieters commented 4 years ago

Python 2.7 doesn't have the enum module, but the enum34 backport suffices here. Include it only when Python 2.7 is used.

Fixes #101

Rambatino commented 4 years ago

Thanks for this @mjpieters, will fix this circle CI issue and review this and the other issues/prs

Rambatino commented 4 years ago

Thank-you 🙏