Main update in this release is the implementation of the FieldMask class.

Previously this would have worked:

...
maskItems = [ "id", "credentials", "lastEventTime"]
request = ListDevicesRequest(parent=parent, fieldMask=','.join(maskItems))
...

With this release the above will work PLUS the following:

...
maskItems = [ "id", "credentials", "lastEventTime"]
request = ListDevicesRequest(parent=parent, fieldMask=FieldMask(paths=maskItems))
...