Actually, we can work around needing dateutil.

If dateutil is present, we'll use that. If not, we'll use
some regexes from the fixed_datetime module.

sleekxmpp/plugins/xep_0082.py

@@ -10,13 +10,7 @@ import logging
 import datetime as dt
 
 from sleekxmpp.plugins.base import base_plugin
-
-try:
-    from dateutil import parser
-    from dateutil.tz import tzoffset, tzutc
-except e:
-    log = logging.getLogger(__name__)
-    log.warning("XEP-0082 plugin requires dateutil")
+from sleekxmpp.thirdparty import tzutc, tzoffset, parse_iso
 
 
 # =====================================================================
@@ -31,7 +25,8 @@ def parse(time_str):
     Arguments:
         time_str -- A formatted timestamp string.
     """
-    return parser.parse(time_str)
+    return parse_iso(time_str)
+
 
 def format_date(time_obj):
     """
@@ -52,7 +47,7 @@ def format_time(time_obj):
     Return a formatted string version of a time object.
 
     format:
-        hh:mm:ss[.sss][TZD
+        hh:mm:ss[.sss][TZD]
 
     arguments:
         time_obj -- A time or datetime object.