This commit was manufactured by cvs2svn to create tag

'Version_1_21_1'.

[SVN r9561]

example/test_abstract.py

@@ -0,0 +1,23 @@
+# Example by Ullrich Koethe
+r'''>>> from abstract import *
+    >>> class A(Abstract):
+    ...     def __init__(self, text):
+    ...             Abstract.__init__(self)  # call the base class constructor
+    ...             self.text = text
+    ...     def test(self):                  # implement abstract function
+    ...             return self.text
+    ...
+    >>> a = A("Hello")
+    >>> a.test()
+    'Hello'
+'''
+
+def run(args = None):
+    if args is not None:
+        import sys
+        sys.argv = args
+    import doctest, test_abstract
+    doctest.testmod(test_abstract)
+
+if __name__ == '__main__':
+    run()