setuptools setup problem

[TomGeorge]

I am using python3.4 on debian jessie  After the following enties

from setuptools import setup

setup(
   name='vseach',
   version='1.0',
   py_modules=['vsearch'],
)

Error:
error:no commands supplied

vsearch is a file in the current directory containing two function definitions.

I am just getting started with python and have found several instructions identical to the lines above. None specify a command..

Is there something I have missed?