How to use the numerapi.__version__ function in numerapi

# The master toctree document.
master_doc = 'index'

# General information about the project.
project = 'numerapi'
copyright = '2018, uuazed'
author = 'uuazed'

# The version info for the project you're documenting, acts as replacement for
# |version| and |release|, also used in various other places throughout the
# built documents.
#
# The short X.Y version.

import numerapi
version = release = numerapi.__version__

# The language for content autogenerated by Sphinx. Refer to documentation
# for a list of supported languages.
#
# This is also used if you do content translation via gettext catalogs.
# Usually you set "language" from the command line for these cases.
language = None

# List of patterns, relative to source directory, that match files and
# directories to ignore when looking for source files.
# This patterns also effect to html_static_path and html_extra_path
exclude_patterns = ['_build', 'Thumbs.db', '.DS_Store']

# The name of the Pygments (syntax highlighting) style to use.
pygments_style = 'sphinx'

def version():
    """Installed numerapi version."""
    print(numerapi.__version__)