How to use the xgcm.__version__ function in xgcm

# General information about the project.
project = u"xgcm"
copyright = u"2016-2019, xgcm developers"

html_show_sourcelink = True
srclink_project = "https://github.com/xgcm/xgcm"
srclink_branch = "master"
srclink_src_path = "doc/"

# 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 full version, including alpha/beta/rc tags.
release = xgcm.__version__
# The short X.Y version.
version = ".".join(release.split(".")[:2])

# The language for content autogenerated by Sphinx. Refer to documentation
# for a list of supported languages.
# language = None

# There are two options for replacing |today|: either, you set today to some
# non-false value, then it is used:
# today = ''
# Else, today_fmt is used as the format for a strftime call.
# today_fmt = '%B %d, %Y'

# List of patterns, relative to source directory, that match files and
# directories to ignore when looking for source files.