sync to Atlas repo

dicts/strkeydict0.py

@@ -14,6 +14,16 @@ Tests for item retrieval using `d[key]` notation::
       ...
     KeyError: '1'
 
+Tests for item retrieval using `d.get(key)` notation::
+
+    >>> d.get('2')
+    'two'
+    >>> d.get(4)
+    'four'
+    >>> d.get(1, 'N/A')
+    'N/A'
+
+
 Tests for the `in` operator::
 
     >>> 2 in d
@@ -24,8 +34,8 @@ Tests for the `in` operator::
 # END STRKEYDICT0_TESTS
 """
 
-# BEGIN STRKEYDICT0
 
+# BEGIN STRKEYDICT0
 class StrKeyDict0(dict):  # <1>
 
     def __missing__(self, key):
@@ -33,7 +43,13 @@ class StrKeyDict0(dict):  # <1>
             raise KeyError(key)
         return self[str(key)]  # <3>
 
-    def __contains__(self, key):
-        return key in self.keys() or str(key) in self.keys()  # <4>
+    def get(self, key, default=None):
+        try:
+            return self[key]  # <4>
+        except KeyError:
+            return default  # <5>
 
-# END STRKEYDICT0
+    def __contains__(self, key):
+        return key in self.keys() or str(key) in self.keys()  # <6>
+
+# END STRKEYDICT0