How to use the gcsfs.__version__ function in gcsfs

# The master toctree document.
master_doc = "index"

# General information about the project.
project = "GCSFs"
copyright = "2017, Continuum Analytics"
author = "Continuum Analytics"

# 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 gcsfs

version = gcsfs.__version__
# The full version, including alpha/beta/rc tags.
release = 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

# 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'

async def _get_file(self, rpath, lpath, **kwargs):
        if await self._isdir(rpath):
            return
        u2 = self.url(rpath)
        headers = kwargs.pop("headers", {})
        consistency = kwargs.pop("consistency", self.consistency)
        if "User-Agent" not in headers:
            headers["User-Agent"] = "python-gcsfs/" + version
        headers.update(self.heads or {})  # add creds

        # needed for requester pays buckets
        if self.requester_pays:
            if isinstance(self.requester_pays, str):
                user_project = self.requester_pays
            else:
                user_project = self.project
            kwargs["userProject"] = user_project

        async with self.session.get(
            url=u2, params=kwargs, headers=headers, timeout=self.requests_timeout,
        ) as r:
            r.raise_for_status()
            if self.consistency == "md5":
                md = md5()