How to use the pybliometrics.__version__ function in pybliometrics

'sphinx.ext.autodoc',
    'sphinx.ext.autosummary',
    'sphinx.ext.coverage',
    'sphinx.ext.doctest',
    'sphinx.ext.mathjax',
    'sphinx.ext.napoleon',
    'sphinx.ext.viewcode']

templates_path = ['_templates']
source_suffix = '.rst'
master_doc = 'index'
project = 'pybliometrics'
author = 'John Kitchin and Michael E. Rose'
copyright = ','.join(['2017-2019', author])

version = pybliometrics.__version__
release = pybliometrics.__version__

language = None

exclude_patterns = ['_build', 'Thumbs.db', '.DS_Store']

pygments_style = 'sphinx'
todo_include_todos = False
autodoc_member_order = 'groupwise'

# Options for HTML output
html_theme = 'alabaster'
html_theme_options = {
    'github_user': 'pybliometrics-dev',
    'github_repo': 'pybliometrics',
    'github_banner': 'true',

'sphinx.ext.autosummary',
    'sphinx.ext.coverage',
    'sphinx.ext.doctest',
    'sphinx.ext.mathjax',
    'sphinx.ext.napoleon',
    'sphinx.ext.viewcode']

templates_path = ['_templates']
source_suffix = '.rst'
master_doc = 'index'
project = 'pybliometrics'
author = 'John Kitchin and Michael E. Rose'
copyright = ','.join(['2017-2019', author])

version = pybliometrics.__version__
release = pybliometrics.__version__

language = None

exclude_patterns = ['_build', 'Thumbs.db', '.DS_Store']

pygments_style = 'sphinx'
todo_include_todos = False
autodoc_member_order = 'groupwise'

# Options for HTML output
html_theme = 'alabaster'
html_theme_options = {
    'github_user': 'pybliometrics-dev',
    'github_repo': 'pybliometrics',
    'github_banner': 'true',
    'github_button': 'true',