Martin Geubelle
9f09c625f5
Depending on the version of dateutil, rule._bynweekday can either be a tuple or a set (see https://github.com/dateutil/dateutil/pull/54), which, in the case of a set, breaks the access by index (see related issue: https://github.com/dateutil/dateutil/issues/24). By casting it into a list, we make sure that we can access [0] in both case. Credits to jke ; closes opw-690761.