I know that vim has native support for cucumber (the original BDD framework for Ruby). I have also found
https://github.com/veloce/vim-behat for BDD with PHP (frightening idea!), but I haven't found a module supporting BDD with vim and Python.
Especially I envy to our Ruby friends ability to jump from the particular line in the .feature file to the definition of step in the appropriate Ruby file.
Does anybody know about any project which would do the same with behave what vim does for Ruby?