Use _use_c variable in bson.has_c() function

wbolster · behackett · commit 0c78e29e080a · 2012-02-08T15:17:11.000-08:00
Don't needlessly retry to import _cbson each time the (public)
bson.has_c() function is called. The internal _use_c variable
that is set when the module is loaded already contains the
needed information.
diff --git a/bson/__init__.py b/bson/__init__.py
@@ -553,8 +553,4 @@ def has_c():
 
     .. versionadded:: 1.9
     """
-    try:
-        from bson import _cbson
-        return True
-    except ImportError:
-        return False
+    return _use_c
