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-rw-r--r--quarg/actions.py3
1 files changed, 3 insertions, 0 deletions
diff --git a/quarg/actions.py b/quarg/actions.py
index e1fbc57..528d515 100644
--- a/quarg/actions.py
+++ b/quarg/actions.py
@@ -46,6 +46,9 @@ class ParseAround(argparse.Action):
def __call__(self, parser, namespace, aroundspec, option_string=None):
if '/' in aroundspec:
datespec, rangespec = aroundspec.split('/', 1)
+ if not rangespec:
+ errx('Missing range for --around')
+
try:
hour_range = int(rangespec)
except ValueError as err: