sass · asottile · Sep 16, 2018 · Sep 16, 2018
diff --git a/pysass.cpp b/pysass.cpp
@@ -4,9 +4,11 @@
 #if PY_MAJOR_VERSION >= 3
 #define PySass_IF_PY3(three, two) (three)
 #define PySass_Object_Bytes(o) PyUnicode_AsUTF8String(PyObject_Str(o))
+#define COLLECTIONS_ABC_MOD "collections.abc"
 #else
 #define PySass_IF_PY3(three, two) (two)
 #define PySass_Object_Bytes(o) PyObject_Str(o)
+#define COLLECTIONS_ABC_MOD "collections"
 #endif
 
 #ifdef __cplusplus
@@ -322,7 +324,7 @@ static union Sass_Value* _to_sass_value(PyObject* value) {
     PyObject* sass_list_t = PyObject_GetAttrString(types_mod, "SassList");
     PyObject* sass_warning_t = PyObject_GetAttrString(types_mod, "SassWarning");
     PyObject* sass_error_t = PyObject_GetAttrString(types_mod, "SassError");
-    PyObject* collections_mod = PyImport_ImportModule("collections");
+    PyObject* collections_mod = PyImport_ImportModule(COLLECTIONS_ABC_MOD);
     PyObject* mapping_t = PyObject_GetAttrString(collections_mod, "Mapping");
 
     if (value == Py_None) {

diff --git a/sass.py b/sass.py
@@ -25,6 +25,7 @@
 from six import string_types, text_type, PY2, PY3
 
 import _sass
+from sassutils._compat import collections_abc
 
 __all__ = (
     'MODES', 'OUTPUT_STYLES', 'SOURCE_COMMENTS', 'CompileError', 'SassColor',
@@ -144,7 +145,7 @@ def from_named_function(cls, function):
     def __init__(self, name, arguments, callable_):
         if not isinstance(name, string_types):
             raise TypeError('name must be a string, not ' + repr(name))
-        elif not isinstance(arguments, collections.Sequence):
+        elif not isinstance(arguments, collections_abc.Sequence):
             raise TypeError('arguments must be a sequence, not ' +
                             repr(arguments))
         elif not callable(callable_):
@@ -582,12 +583,15 @@ def _get_file_arg(key):
         include_paths = include_paths.encode(fs_encoding)
 
     custom_functions = kwargs.pop('custom_functions', ())
-    if isinstance(custom_functions, collections.Mapping):
+    if isinstance(custom_functions, collections_abc.Mapping):
         custom_functions = [
             SassFunction.from_lambda(name, lambda_)
             for name, lambda_ in custom_functions.items()
         ]
-    elif isinstance(custom_functions, (collections.Set, collections.Sequence)):
+    elif isinstance(
+            custom_functions,
+            (collections_abc.Set, collections_abc.Sequence),
+    ):
         custom_functions = [
             func if isinstance(func, SassFunction)
             else SassFunction.from_named_function(func)
@@ -758,7 +762,7 @@ def __new__(cls, msg):
         return super(SassWarning, cls).__new__(cls, msg)
 
 
-class SassMap(collections.Mapping):
+class SassMap(collections_abc.Mapping):
     """Because sass maps can have mapping types as keys, we need an immutable
     hashable mapping type.
 

diff --git a/sasstests.py b/sasstests.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from __future__ import with_statement
 
-import collections
 import contextlib
 import glob
 import json
@@ -25,6 +24,7 @@
 import pysassc
 import sass
 import sassc
+from sassutils._compat import collections_abc
 from sassutils.builder import Manifest, build_directory
 from sassutils.wsgi import SassMiddleware
 
@@ -127,6 +127,12 @@ def normalize_path(path):
 '''
 
 
+@pytest.fixture(autouse=True)
+def no_warnings(recwarn):
+    yield
+    assert len(recwarn) == 0
+
+
 class BaseTestCase(unittest.TestCase):
 
     def assert_source_map_equal(self, expected, actual):
@@ -153,7 +159,7 @@ def test_version(self):
         assert re.match(r'^\d+\.\d+\.\d+$', sass.__version__)
 
     def test_output_styles(self):
-        assert isinstance(sass.OUTPUT_STYLES, collections.Mapping)
+        assert isinstance(sass.OUTPUT_STYLES, collections_abc.Mapping)
         assert 'nested' in sass.OUTPUT_STYLES
 
     def test_and_join(self):
@@ -926,8 +932,10 @@ def test_successful(self):
             assert os.path.exists(os.path.join(output_dir, 'foo/f2.css'))
             assert not os.path.exists(os.path.join(output_dir, 'baz.txt'))
 
-            contentsf1 = open(os.path.join(output_dir, 'f1.css')).read()
-            contentsf2 = open(os.path.join(output_dir, 'foo/f2.css')).read()
+            with open(os.path.join(output_dir, 'f1.css')) as f:
+                contentsf1 = f.read()
+            with open(os.path.join(output_dir, 'foo/f2.css')) as f:
+                contentsf2 = f.read()
             assert contentsf1 == 'a b {\n  width: 100%; }\n'
             assert contentsf2 == 'foo {\n  width: 100%; }\n'
 

diff --git a/sassutils/_compat.py b/sassutils/_compat.py
@@ -0,0 +1,7 @@
+from six import PY2
+
+
+if PY2:  # pragma: no cover (PY2)
+    import collections as collections_abc  # noqa: F401
+else:  # pragma: no cover (PY3)
+    import collections.abc as collections_abc  # noqa: F401
diff --git a/sassutils/builder.py b/sassutils/builder.py
@@ -4,7 +4,6 @@
 """
 from __future__ import with_statement
 
-import collections
 import io
 import os
 import os.path
@@ -14,6 +13,7 @@
 from six import string_types
 
 from sass import compile
+from sassutils._compat import collections_abc
 
 __all__ = 'SUFFIXES', 'SUFFIX_PATTERN', 'Manifest', 'build_directory'
 
@@ -104,7 +104,7 @@ class Manifest(object):
     def normalize_manifests(cls, manifests):
         if manifests is None:
             manifests = {}
-        elif isinstance(manifests, collections.Mapping):
+        elif isinstance(manifests, collections_abc.Mapping):
             manifests = dict(manifests)
         else:
             raise TypeError('manifests must be a mapping object, not ' +
@@ -117,7 +117,7 @@ def normalize_manifests(cls, manifests):
                 continue
             elif isinstance(manifest, tuple):
                 manifest = Manifest(*manifest)
-            elif isinstance(manifest, collections.Mapping):
+            elif isinstance(manifest, collections_abc.Mapping):
                 manifest = Manifest(**manifest)
             elif isinstance(manifest, string_types):
                 manifest = Manifest(manifest)

diff --git a/sassutils/wsgi.py b/sassutils/wsgi.py
@@ -4,14 +4,14 @@
 """
 from __future__ import absolute_import, with_statement
 
-import collections
 import logging
 import os
 import os.path
 
 from pkg_resources import resource_filename
 
 from sass import CompileError
+from sassutils._compat import collections_abc
 from .builder import Manifest
 
 __all__ = 'SassMiddleware',
@@ -98,7 +98,7 @@ def __init__(
                             'not ' + repr(app))
         self.app = app
         self.manifests = Manifest.normalize_manifests(manifests)
-        if not isinstance(package_dir, collections.Mapping):
+        if not isinstance(package_dir, collections_abc.Mapping):
             raise TypeError('package_dir must be a mapping object, not ' +
                             repr(package_dir))
         self.error_status = error_status

diff --git a/tox.ini b/tox.ini
@@ -5,4 +5,4 @@ envlist = pypy, pypy3, py27, py35, py36, py37
 deps = -rrequirements-dev.txt
 commands =
     pytest sasstests.py
-    flake8 .
+    pre-commit run --all-files