How to use the picoscope.__version__ function in picoscope

from setuptools import setup
import picoscope

setup(
    name='picoscope',
    version=picoscope.__version__,
    description="Unofficial python wrapper for the PicoScope devices.",
    author="Colin O'Flynn, Mark Harfouche",
    author_email='coflynn@newae.com, mark.harfouche@gmail.com',
    license='BSD',
    url='https://github.com/colinoflynn/pico-python/',
    packages=['picoscope'],
    # See https://PyPI.python.org/PyPI?%3Aaction=list_classifiers
    classifiers=['Development Status :: 4 - Beta',
                 'Intended Audience :: Developers',
                 'Topic :: Software Development :: Libraries',
                 'Topic :: System :: Hardware',
                 'Topic :: Scientific/Engineering',
                 'License :: OSI Approved :: BSD License',
                 'Programming Language :: Python :: 2.7',
                 'Programming Language :: Python :: 3',
                 ],