general use

Author: Richard Jones

roundup/support.py

@@ -0,0 +1,21 @@
+"""Implements various support classes and functions used in a number of
+places in Roundup code.
+"""
+
+__docformat__ = 'restructuredtext'
+
+class TruthDict:
+    '''Returns True for valid keys, False for others.
+    '''
+    def __init__(self, keys):
+        if keys:
+            self.keys = {}
+            for col in keys:
+                self.keys[col] = 1
+        else:
+            self.__getitem__ = lambda name: 1
+
+    def __getitem__(self, name):
+        return self.keys.has_key(name)
+
+# vim: set et sts=4 sw=4 :