no output of pyhton in emacs shell buffer

[leo]

hi there

in an emacs shell buffer i get no output of python, even no ">>>"-prompt.

however, behind the scene python still works, i can type a command blindly,
and _after quitting python_ the associated output is written to the shell
buffer.

some shell config seems to be wrong. my shell buffer sttings are:
(setq shell-file-name "bash")
(setq explicit-shell-file-name shell-file-name)
(setenv "SHELL" shell-file-name)
(setq explicit-sh-args '("-login" "-i"))
(setq shell-command-switch "-c")

i work with ntemacs, the and the cygwin python 2.3.2

any idea?

thanks, leo