Fix test failure on Python 2.7

Author: jaraco

importlib_resources/_compat.py

@@ -8,6 +8,12 @@
     from pathlib2 import Path, PurePath                         # type: ignore
 
 
+try:
+    from contextlib import suppress
+except ImportError:
+    from contextlib2 import suppress                         # type: ignore
+
+
 try:
     from functools import singledispatch
 except ImportError:

importlib_resources/trees.py

@@ -6,7 +6,7 @@
 
 from ._compat import (
     Path, package_spec, FileNotFoundError, ZipPath,
-    singledispatch,
+    singledispatch, suppress,
     )
 
 
@@ -24,7 +24,7 @@ def from_traversable_resources(spec):
     If the spec.loader implements TraversableResources,
     directly or implicitly, it will have a ``files()`` method.
     """
-    with contextlib.suppress(AttributeError):
+    with suppress(AttributeError):
         return spec.loader.files()
 
 

setup.cfg

@@ -22,6 +22,7 @@ install_requires =
     zipp >= 0.4; python_version < '3.8'
     singledispatch; python_version < '3.4'
     importlib_metadata; python_version < '3.8'
+    contextlib2; python_version < '3'
 setup_requires = setuptools_scm[toml] >= 3.4.1
 packages = find: