If some pythoner complain that Vim don't support calltips of python, now I implement it. Try it and wish you enjoy it. http://vim.sourceforge.net/scripts/script.php?script_id=1074
Intro: This script simualate code calltips in a new bottow window of Vim. In fact, it display python help doc strings of word under the cursor by scanning the imported modules in the current file.
0.5 enhance 0.3 and fix many bugs.