[mod_python] Form variables question

Hi All

I am not too experienced with mod_python, so excuse me if this is a silly
question.

I have a form (method post):

<input type=text name=userid>
<input type=text name=pw>

When the form button is clicked I call a function login(req,userid,pw)
Within this function I can use the variables userid and pw to authenticate a
user.

Is this the ideal/safest way of passing variables or are there any
other/better mechanisms

Thanks
Olaf