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4 changes: 2 additions & 2 deletions src/voeventparse/voevent.py
Original file line number Diff line number Diff line change
Expand Up @@ -3,7 +3,7 @@
from __future__ import unicode_literals

import copy
import collections
from typing import Iterable

import pytz
from lxml import objectify, etree
Expand Down Expand Up @@ -431,7 +431,7 @@ def _listify(x):
"""Ensure x is iterable; if not then enclose it in a list and return it."""
if isinstance(x, string_types):
return [x]
elif isinstance(x, collections.Iterable):
elif isinstance(x, Iterable):
return x
else:
return [x]