Just out of curiosity, why would someone believe this? The syntax of python and ruby are nearly identical, but ruby has more tools and support for web-based projects. For someone looking to develop for the web, ruby is pretty clearly a better choice. And this is not knocking python at all, I really enjoy them both and there are many other things python has more community support for - don't get me wrong.
To support what I'm saying about the syntax, check out this comparison: http://hyperpolyglot.org/scripting - they are super similar, if anything ruby is a tiiiny bit more elegant.