Here is what I wrote on this list last year: I saw several messages on this list regarding an error using the demo in the manual regarding "Python module failed". Other than checking that Python is installed before R and in the path, the error might be due to the python3=FALSE default in undergrad(), so using a <3.0 Python for the demo might help (and then if you want to use Python >= 3.0, just use python3=TRUE in the undergrad() function). https://lists.gking.harvard.edu/pipermail/readme/2013-July/000026.html Daniel B. Wright, Ph.D. Statistical and Applied Research 8701 N. MoPac Expressway, Suite 200, Austin, TX 78759 (preferred method of communication is email, use cell if urgent) Office: 512.320.1827 Cell: 786 342 4656 [http://act.org/email/images/image001.png] This email message is intended only for the personal use of the recipient(s) named above. If you are not an intended recipient, you may not review, copy, or distribute this message. If you have received this communication in error, please notify the sender immediately by email and delete the original message. From: readme-bounces(a)lists.gking.harvard.edu [mailto:readme-bounces@lists.gking.harvard.edu] On Behalf Of Mattia Satta Sent: Friday, November 07, 2014 10:52 AM To: readme(a)lists.gking.harvard.edu Subject: [readme] Fwd: Python module failed. Hi! I'm new here. I'm trying to use the command "demo(clinton)" in windows, but an error occurs: ... Python module failed.... I've seen that others have had the same problem, how can I solve it? Thank you! Mat