How to use the betterbib.__about__.__version__ function in betterbib

def write(od, file_handle, delimeter_type, tab_indent):
    # Write header to the output file.
    segments = [
        "%comment{{This file was created with betterbib v{}.}}\n".format(__version__)
    ]

    brace_delimeters = delimeter_type == "braces"

    # Add segments for each bibtex entry in order
    segments.extend(
        [
            pybtex_to_bibtex_string(
                d, bib_id, brace_delimeters=brace_delimeters, tab_indent=tab_indent,
            )
            for bib_id, d in od.items()
        ]
    )

    # Write all segments to the file at once
    file_handle.write("\n\n".join(segments) + "\n")

def get_by_doi(self, doi):
        headers = {
            "User-Agent": "betterbib/{} ({}; mailto:{})".format(
                __version__, __website__, __author_email__
            )
        }
        # https://api.crossref.org/works/10.1137/110820713
        r = requests.get(self.api_url + "/" + doi, headers=headers)
        assert r.ok
        data = r.json()
        result = data["message"]
        return self._crossref_to_pybtex(result)

# Get the containing book, and see if it has authors or editors. If
            # authors, consider it a monograph and use inbook; otherwise
            # incollection.
            # To get the book, make use of the fact that the chapter DOIs are
            # the book DOI plus some appendix, e.g., .ch3, _3, etc. In other
            # words: Strip the last digits plus whatever is nondigit before it.
            a = re.match("(.*?)([^0-9]+[0-9]+)$", entry["DOI"])
            if a is None:
                # The DOI doesn't have that structure; assume 'incollection'.
                return "incollection"

            book_doi = a.group(1)

            headers = {
                "User-Agent": "betterbib/{} ({}; mailto:{})".format(
                    __version__, __website__, __author_email__
                )
            }

            # Try to get the book data
            r = requests.get(self.api_url + "/" + book_doi, headers=headers)
            if r.ok:
                book_data = r.json()
                if "author" in book_data["message"]:
                    return "inbook"
            # else
            return "incollection"

        # All other cases
        _crossref_to_bibtex_type = {
            "book": "book",
            "dataset": "misc",