How to use the requests3.core._http.util.retry.Retry.from_int function in requests3

def __init__(
        self,
        pool_connections=DEFAULT_POOLSIZE,
        pool_maxsize=DEFAULT_POOLSIZE,
        max_retries=DEFAULT_RETRIES,
        pool_block=DEFAULT_POOLBLOCK,
    ):
        if max_retries == DEFAULT_RETRIES:
            self.max_retries = Retry(0, read=False)
        else:
            self.max_retries = Retry.from_int(max_retries)
        self.config = {}
        self.proxy_manager = {}
        super(HTTPAdapter, self).__init__()
        self._pool_connections = pool_connections
        self._pool_maxsize = pool_maxsize
        self._pool_block = pool_block
        self.init_poolmanager(pool_connections, pool_maxsize, block=pool_block)

if self.proxy is not None and u.scheme == "http":
            response = conn.urlopen(method, url, **kw)
        else:
            response = conn.urlopen(method, u.request_uri, **kw)
        redirect_location = redirect and response.get_redirect_location()
        if not redirect_location:
            return response

        # Support relative URLs for redirecting.
        redirect_location = urljoin(url, redirect_location)
        # RFC 7231, Section 6.4.4
        if response.status == 303:
            method = 'GET'
        retries = kw.get('retries')
        if not isinstance(retries, Retry):
            retries = Retry.from_int(retries, redirect=redirect)
        try:
            retries = retries.increment(
                method, url, response=response, _pool=conn
            )
        except MaxRetryError:
            if retries.raise_on_redirect:
                raise

            return response

        kw['retries'] = retries
        kw['redirect'] = redirect
        retries.sleep_for_retry(response)
        log.info("Redirecting %s -> %s", url, redirect_location)
        return self.urlopen(method, redirect_location, **kw)

block for ``pool_timeout`` seconds and raise EmptyPoolError if no
            connection is available within the time period.

        :param int body_pos:
            Position to seek to in file-like body in the event of a retry or
            redirect. Typically this won't need to be set because urllib3 will
            auto-populate the value when needed.

        :param \\**response_kw:
            Additional parameters are passed to
            :meth:`urllib3.response.HTTPResponse.from_httplib`
        """
        if headers is None:
            headers = self.headers
        if not isinstance(retries, Retry):
            retries = Retry.from_int(
                retries, default=self.retries, redirect=False
            )
        conn = None
        # Track whether `conn` needs to be released before
        # returning/raising/recursing.
        release_this_conn = False
        # Merge the proxy headers. Only do this in HTTP. We have to copy the
        # headers dict so we can safely change it without those changes being
        # reflected in anyone else's copy.
        if self.scheme == 'http':
            headers = headers.copy()
            headers.update(self.proxy_headers)
        # Must keep the exception bound to a separate variable or else Python 3
        # complains about UnboundLocalError.
        err = None
        # Keep track of whether we cleanly exited the except block. This

block for ``pool_timeout`` seconds and raise EmptyPoolError if no
            connection is available within the time period.

        :param int body_pos:
            Position to seek to in file-like body in the event of a retry or
            redirect. Typically this won't need to be set because urllib3 will
            auto-populate the value when needed.

        :param \\**response_kw:
            Additional parameters are passed to
            :meth:`urllib3.response.HTTPResponse.from_httplib`
        """
        if headers is None:
            headers = self.headers
        if not isinstance(retries, Retry):
            retries = Retry.from_int(
                retries, default=self.retries, redirect=False
            )
        conn = None
        # Track whether `conn` needs to be released before
        # returning/raising/recursing.
        release_this_conn = False
        # Merge the proxy headers. Only do this in HTTP. We have to copy the
        # headers dict so we can safely change it without those changes being
        # reflected in anyone else's copy.
        if self.scheme == 'http':
            headers = headers.copy()
            headers.update(self.proxy_headers)
        # Must keep the exception bound to a separate variable or else Python 3
        # complains about UnboundLocalError.
        err = None
        # Keep track of whether we cleanly exited the except block. This

if self.proxy is not None and u.scheme == "http":
            response = await conn.urlopen(method, url, **kw)
        else:
            response = await conn.urlopen(method, u.request_uri, **kw)
        redirect_location = redirect and response.get_redirect_location()
        if not redirect_location:
            return response

        # Support relative URLs for redirecting.
        redirect_location = urljoin(url, redirect_location)
        # RFC 7231, Section 6.4.4
        if response.status == 303:
            method = 'GET'
        retries = kw.get('retries')
        if not isinstance(retries, Retry):
            retries = Retry.from_int(retries, redirect=redirect)
        try:
            retries = retries.increment(
                method, url, response=response, _pool=conn
            )
        except MaxRetryError:
            if retries.raise_on_redirect:
                raise

            return response

        kw['retries'] = retries
        kw['redirect'] = redirect
        retries.sleep_for_retry(response)
        log.info("Redirecting %s -> %s", url, redirect_location)
        return self.urlopen(method, redirect_location, **kw)