Merge pull request #1 from LarsHill/fix-metadict-unpacking-warning

Fix metadict unpacking warning

metadict/__about__.py

@@ -1,7 +1,7 @@
 import time
 
 _this_year = time.strftime("%Y")
-__version__ = '0.1.0'
+__version__ = '0.1.1'
 __author__ = 'Lars Hillebrand'
 __author_email__ = 'hokage555@web.de'
 __license__ = 'Apache-2.0'

metadict/metadict.py

@@ -2,6 +2,7 @@
 import keyword
 import re
 import warnings
+from collections.abc import KeysView
 from typing import MutableMapping, Dict, Iterator, TypeVar, Iterable, Optional, Mapping, Any, Tuple
 
 
@@ -265,3 +266,17 @@ def _contains_mapping(iterable: Iterable, ignore: Optional[type] = None) -> bool
             elif isinstance(x, (list, set, tuple)):
                 return MetaDict._contains_mapping(x, ignore)
         return False
+
+    # add the following inherited methods from collections.abc.Mapping directly to make pycharm happy
+    # (removing an annoying warning for dict unpacking)
+    def __contains__(self, key):
+        try:
+            self[key]
+        except KeyError:
+            return False
+        else:
+            return True
+
+    def keys(self):
+        """D.keys() -> a set-like object providing a view on D's keys"""
+        return KeysView(self)

tests/test_metadict.py

@@ -143,6 +143,11 @@ def test_update(config: Dict):
     assert cfg == config
 
 
+def test_contains(config: Dict):
+    cfg = MetaDict(config)
+    assert 'model' in cfg
+
+
 def test_copy(config: Dict):
     cfg = MetaDict(config)
     assert copy.copy(cfg) is not cfg