Add a get_first convenience function to ODict.

netlib/odict.py

@@ -80,6 +80,12 @@ class ODict:
         else:
             return d
 
+    def get_first(self, k, d=None):
+        if k in self:
+            return self[k][0]
+        else:
+            return d
+
     def items(self):
         return self.lst[:]
 

test/test_odict.py

@@ -85,6 +85,12 @@ class TestODict:
         assert self.od.get("one") == ["two"]
         assert self.od.get("two") == None
 
+    def test_get_first(self):
+        self.od.add("one", "two")
+        self.od.add("one", "three")
+        assert self.od.get_first("one") == "two"
+        assert self.od.get_first("two") == None
+
 
 class TestODictCaseless:
     def setUp(self):