import dateutil.parser

How did this work!?

example/aitf/argparsetools.py

@@ -6,6 +6,8 @@ import argparse
 import re
 from datetime import datetime, timedelta
 
+import dateutil.parser
+
 CACHE_ENV="CSPP_GEO_AITF_CACHE"
 
 def argerror(msg):