[2.0.x] Fixed #28711 -- Fixed unordered_list template filter with lazy translations.

Backport of d997ab776477dd9ecb158229b2622c7f1ed93dfb from master

1 files changed, 2 insertions, 1 deletions

diff --git a/django/template/defaultfilters.py b/django/template/defaultfilters.py
index b172be6239..935fcdff8e 100644
--- a/django/template/defaultfilters.py
+++ b/django/template/defaultfilters.py
@@ -1,6 +1,7 @@
 """Default variable filters."""
 import random as random_module
 import re
+import types
 from decimal import ROUND_HALF_UP, Context, Decimal, InvalidOperation
 from functools import wraps
 from operator import itemgetter
@@ -616,7 +617,7 @@ def unordered_list(value, autoescape=True):
                 except StopIteration:
                     yield item, None
                     break
-                if not isinstance(next_item, str):
+                if isinstance(next_item, (list, tuple, types.GeneratorType)):
                     try:
                         iter(next_item)
                     except TypeError: