…epository. Resolve problem of passing time_zone to sanatize_dates method where a series of time_zones is passed. A series of time zones is passed when a sensor that appears in multiple groups is queried as a consequence of flattening the dataframe. Resolve by adding a method sensors_unique which passes the first row of a dataframe or an appropriately formated Series object to sanatize_dates method instead.
…epository. Resolve problem of passing time_zone to sanatize_dates method where a series of time_zones is passed. A series of time zones is passed when a sensor that appears in multiple groups is queried as a consequence of flattening the dataframe. Resolve by adding a method sensors_unique which passes the first row of a dataframe or an appropriately formated Series object to sanatize_dates method instead.