BLD: Add pre-commit.

Author: Scott Sanderson

.gitignore

@@ -63,3 +63,4 @@ MANIFEST
 
 # pytest
 .cache
+.pytest_cache

.pre-commit-config.yaml

@@ -0,0 +1,19 @@
+default_language_version:
+  python: python3.6
+
+repos:
+
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v2.1.0
+    hooks:
+      - id: check-merge-conflict
+      - id: check-yaml
+        args: [--allow-multiple-documents]
+      - id: check-symlinks
+      - id: end-of-file-fixer
+      - id: trailing-whitespace
+
+  - repo: https://gitlab.com/pycqa/flake8
+    rev: 3.7.7
+    hooks:
+    - id: flake8

interface/compat.py

@@ -70,3 +70,17 @@ class metaclass(meta):
         def __new__(cls, name, this_bases, d):
             return meta(name, bases, d)
     return type.__new__(metaclass, 'temporary_class', (), {})
+
+
+__all__ = [
+    'PY2',
+    'PY3',
+    'Parameter',
+    'raise_from',
+    'signature',
+    'unwrap',
+    'viewkeys',
+    'with_metaclass',
+    'wraps',
+    'zip_longest',
+]

interface/tests/test_interface.py

@@ -298,7 +298,7 @@ class I(Interface):
 
 def test_reject_non_callable_interface_field():
 
-    with pytest.raises(TypeError) as e:
+    with pytest.raises(TypeError):
         class IFace(Interface):
             x = "not allowed"
 

interface/tests/test_typecheck.py

@@ -79,4 +79,4 @@ def test_first_argument_name():
 
 
 if PY3:  # pragma: nocover
-    from ._py3_typecheck_tests import *
+    from ._py3_typecheck_tests import *  # noqa

interface/typecheck.py

@@ -75,10 +75,10 @@ def params_compatible(impl, iface):
         return has_default(impl)
 
     return (
-        impl.name == iface.name and
-        impl.kind == iface.kind and
-        has_default(impl) == has_default(iface) and
-        annotations_compatible(impl, iface)
+        impl.name == iface.name
+        and impl.kind == iface.kind
+        and has_default(impl) == has_default(iface)
+        and annotations_compatible(impl, iface)
     )
 
 

tox.ini

@@ -7,7 +7,7 @@ max-line-length = 90
 
 [flake8]
 max_line_length = 90
-ignore=F811,E741
+ignore=F811,E741,W503,E742
 
 [testenv]
 commands=