usage: lenses.py [-h] [--clear] [--date DATE] [--fill] [--missed] [--used]
optional arguments:
-h, --help show this help message and exit
--clear, -c clear lenses account log file
--date DATE, -d DATE date when lenses were used or unused (default: today)
--fill, -f option to set all unspecified dates between the first
and the last dates as missed
--missed, -m option to specify that lenses were unused
--used, -u option to specify that lenses were used
$ lenses
2020-04-20:1
2020-04-21:1
2020-04-22:1
2020-04-23:0
2020-04-24:1
2020-04-25:1
2020-04-26:0
2020-04-27:0
2020-04-28:1
2020-04-29:1
------------
USED: 7