how to execute Python in VIM

[DENG]

hi,

im a newbie to VIM(gVIM under WINXP), i want to execute python in vim
like press F5 in SciTE.

i try to search in google and config as follows in my _vimrc:
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map <f5>:D:\python24\python.exe %

if has("autocmd")


  autocmd FileType python setlocal et | setlocal sta | setlocal sw=4
  autocmd FileType python compiler pyunit
  autocmd FileType python setlocal makeprg=python\ ./alltests.py
  autocmd BufNewFile,BufRead test*.py setlocal makeprg=python\ %


endif

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but neither F5 nor MAKE works.....

who can help me ?

thanks in advance