warnings: Add example.

2015-02-22 14:07:40 +02:00 · 2015-02-22 14:07:40 +02:00 · ffc30e8c68
commit ffc30e8c68
--- a/warnings/example_warn.py
+++ b/warnings/example_warn.py
@ -0,0 +1,6 @@
+import warnings
+
+warnings.warn('block_size of %d seems too small; using our '
+                               'default of %d.',
+                               RuntimeError, 2)
+#                               RuntimeWarning, 2)