utm.toLatLon: unable to use "northern" without "zoneLetter" (undefined is not false)

[perhallstroem]

To reproduce:

– call utm.toLatLon(easting, northing, 55, undefined, false) and you get
– "Error: either zone_letter or northern needs to be set"

This is despite the fact that northern in fact is set, but to false. The error seems to be caused by an incorrect translation from Python's if not zone_letter and northern is None: my understanding is that we must check to see if northern is undefined.

[TimothyGu]

Thanks for reporting!

[perhallstroem]

Wow, that was quick. My tests are passing without my "monkey patch" – great! 👍