1 files changed, 7 insertions, 0 deletions

diff --git a/glucometer.py b/glucometer.py
index 385653c..88c44b4 100755
--- a/glucometer.py
+++ b/glucometer.py
@@ -54,6 +54,9 @@ def main():
     '--sort-by', action='store', default='timestamp',
     choices=common._ReadingBase._fields,
     help='Field to order the dumped data by.')
+  parser_dump.add_argument(
+    '--with-ketone', action='store_true', default=False,
+    help='Enable ketone reading if available on the glucometer.')
 
   parser_date = subparsers.add_parser(
     'datetime', help='Reads or sets the date and time of the glucometer.')
@@ -99,6 +102,10 @@ def main():
 
       readings = device.get_readings()
 
+      if not args.with_ketone:
+        readings = (reading for reading in readings
+                    if not isinstance(reading, common.KetoneReading))
+
       if args.sort_by is not None:
         readings = sorted(
           readings, key=lambda reading: getattr(reading, args.sort_by))