Retrievinng version number in setup.py

setup.py

def get_version():
    local_vars = {}
    try:
        execfile('src/imagination/objectid_manager/__init__.py',
                 {},
                 local_vars)
    except NameError:
        # python3.x does not provide execfile
        with open('src/imagination/objectid_manager/__init__.py') as f:
            exec(f.read(), {}, local_vars)
    return local_vars.get('__version__')