Testing for file existence

[P Browning]

What's the recommended way to do this in Python?
In Perl you've got -x File tests.

TIA

Paul


-- 
--
 The Library, Tyndall Avenue, Univ. of Bristol, Bristol, BS8 1TJ, UK 
    E-mail: Paul.Browning at bristol.ac.uk  URL: http://www.bris.ac.uk/