Subscribe & Unsubscribe won't accept list

[DJDevon3]

This works

io.subscribe("BME280-Unbiased")
io.subscribe("BME280-RealTemp")

attempting to subscribe to 2 feeds simultaneously doesn't work. here are a few of the iterations I tried.

io.subscribe("BME280-Unbiased", "BME280-RealTemp")
io.subscribe([("BME280-Unbiased", "BME280-RealTemp")])
io.subscribe([('BME280-Unbiased'), ('BME280-RealTemp')])

According to the docs

client.subscribe([('temperature'), ('humidity')])

should work but does not, returns
TypeError: can't convert 'list' object to str implicitly