fix issue 106, Text undefined in 3.5.10.14.1

Reported by Charles Bouchard-L?gar?

1 files changed, 5 insertions, 3 deletions

diff --git a/dumper.py b/dumper.py
index 139265e..da64056 100644
--- a/dumper.py
+++ b/dumper.py
@@ -2,9 +2,7 @@
 
 from __future__ import absolute_import
 
-from typing import Any, Dict, List, Union               # NOQA
-
-from ruamel.yaml.compat import StreamType, VersionType  # NOQA
+import sys
 
 from ruamel.yaml.emitter import Emitter
 from ruamel.yaml.serializer import Serializer
@@ -12,6 +10,10 @@ from ruamel.yaml.representer import Representer, SafeRepresenter, BaseRepresente
     RoundTripRepresenter
 from ruamel.yaml.resolver import Resolver, BaseResolver, VersionedResolver
 
+if sys.version_info >= (3, 5, 2):
+    from typing import Any, Dict, List, Union               # NOQA
+    from ruamel.yaml.compat import StreamType, VersionType  # NOQA
+
 __all__ = ['BaseDumper', 'SafeDumper', 'Dumper', 'RoundTripDumper']