Document that the blog demo is py2-only.

diff --git a/demos/blog/README b/demos/blog/README
index 4178f1446f9b359ffa475bc468d672b6a4451995..dc2a4d8e98968f08dcee16e7a6d85f6559a44955 100644 (file)
--- a/demos/blog/README
+++ b/demos/blog/README
@@ -19,7 +19,8 @@ need to set up MySQL and the database schema for the demo to run.
 3. Install Python prerequisites
 
    Install the packages MySQL-python, torndb, and markdown (e.g. using pip or
-   easy_install)
+   easy_install). Note that these packages currently only work on
+   Python 2. Tornado supports Python 3, but this blog demo does not.
 
 3. Connect to MySQL and create a database and user for the blog.