In the README.rst the example for QR-Codes has this:
.qr: 450|https://github.com/ionelmc/python-darkslide
The prefix 450| was added with 2577a36 for #2 by @ionelmc , but I cannot figure out for what: It is embedded within the URL, which makes it invalid.
Please remove it or at least add a comment explaining the prefix.