How to use the pyproj.utils._copytobuffer function in pyproj

Parameters
        ----------
        lons: array, :class:`numpy.ndarray`, list, tuple, or scalar
            An array of longitude values.
        lats: array, :class:`numpy.ndarray`, list, tuple, or scalar
            An array of latitude values.
        radians: bool, optional
            If True, the input data is assumed to be in radians.

        Returns
        -------
        (float, float):
            The geodesic area (meters^2) and permimeter (meters) of the polygon.
        """
        return self._polygon_area_perimeter(
            _copytobuffer(lons)[0], _copytobuffer(lats)[0], radians=radians
        )

Parameters
        ----------
        lons: array, :class:`numpy.ndarray`, list, tuple, or scalar
            The longitude points along a line.
        lats: array, :class:`numpy.ndarray`, list, tuple, or scalar
            The latitude points along a line.
        radians: bool, optional
            If True, the input data is assumed to be in radians.

        Returns
        -------
        float: The total length of the line.
        """
        # process inputs, making copies that support buffer API.
        inx, xisfloat, xislist, xistuple = _copytobuffer(lons)
        iny, yisfloat, yislist, yistuple = _copytobuffer(lats)
        return self._line_length(inx, iny, radians=radians)

>>> transprojr = Transformer.from_crs(
        ...     "EPSG:4326",
        ...     {"proj":'geocent', "ellps":'WGS84', "datum":'WGS84'},
        ...     always_xy=True,
        ... )
        >>> xpjr, ypjr, zpjr = transprojr.transform(xpj, ypj, zpj, radians=True)
        >>> "%.3f %.3f %.3f" % (xpjr, ypjr, zpjr)
        '-2704026.010 -4253051.810 3895878.820'
        >>> transformer = Transformer.from_proj("epsg:4326", 4326, skip_equivalent=True)
        >>> xeq, yeq = transformer.transform(33, 98)
        >>> "%.0f  %.0f" % (xeq, yeq)
        '33  98'

        """
        # process inputs, making copies that support buffer API.
        inx, xisfloat, xislist, xistuple = _copytobuffer(xx)
        iny, yisfloat, yislist, yistuple = _copytobuffer(yy)
        if zz is not None:
            inz, zisfloat, zislist, zistuple = _copytobuffer(zz)
        else:
            inz = None
        if tt is not None:
            intime, tisfloat, tislist, tistuple = _copytobuffer(tt)
        else:
            intime = None
        # call pj_transform.  inx,iny,inz buffers modified in place.
        self._transformer._transform(
            inx,
            iny,
            inz=inz,
            intime=intime,
            direction=direction,

forward transformation - Returns longitudes, latitudes and back
        azimuths of terminus points given longitudes (lons) and
        latitudes (lats) of initial points, plus forward azimuths (az)
        and distances (dist).
        latitudes (lats) of initial points, plus forward azimuths (az)
        and distances (dist).

        Works with numpy and regular python array objects, python
        sequences and scalars.

        if radians=True, lons/lats and azimuths are radians instead of
        degrees. Distances are in meters.
        """
        # process inputs, making copies that support buffer API.
        inx, xisfloat, xislist, xistuple = _copytobuffer(lons)
        iny, yisfloat, yislist, yistuple = _copytobuffer(lats)
        inz, zisfloat, zislist, zistuple = _copytobuffer(az)
        ind, disfloat, dislist, distuple = _copytobuffer(dist)
        self._fwd(inx, iny, inz, ind, radians=radians)
        # if inputs were lists, tuples or floats, convert back.
        outx = _convertback(xisfloat, xislist, xistuple, inx)
        outy = _convertback(yisfloat, yislist, xistuple, iny)
        outz = _convertback(zisfloat, zislist, zistuple, inz)
        return outx, outy, outz

Parameters
        ----------
        lons: array, :class:`numpy.ndarray`, list, tuple, or scalar
            The longitude points along a line.
        lats: array, :class:`numpy.ndarray`, list, tuple, or scalar
            The latitude points along a line.
        radians: bool, optional
            If True, the input data is assumed to be in radians.

        Returns
        -------
        array, :class:`numpy.ndarray`, list, tuple, or scalar:
            The total length of the line.
        """
        # process inputs, making copies that support buffer API.
        inx, xisfloat, xislist, xistuple = _copytobuffer(lons)
        iny, yisfloat, yislist, yistuple = _copytobuffer(lats)
        self._line_length(inx, iny, radians=radians)
        line_lengths = _convertback(xisfloat, xislist, xistuple, inx)
        return line_lengths if xisfloat else line_lengths[:-1]

"""
        forward transformation - Returns longitudes, latitudes and back
        azimuths of terminus points given longitudes (lons) and
        latitudes (lats) of initial points, plus forward azimuths (az)
        and distances (dist).
        latitudes (lats) of initial points, plus forward azimuths (az)
        and distances (dist).

        Works with numpy and regular python array objects, python
        sequences and scalars.

        if radians=True, lons/lats and azimuths are radians instead of
        degrees. Distances are in meters.
        """
        # process inputs, making copies that support buffer API.
        inx, xisfloat, xislist, xistuple = _copytobuffer(lons)
        iny, yisfloat, yislist, yistuple = _copytobuffer(lats)
        inz, zisfloat, zislist, zistuple = _copytobuffer(az)
        ind, disfloat, dislist, distuple = _copytobuffer(dist)
        self._fwd(inx, iny, inz, ind, radians=radians)
        # if inputs were lists, tuples or floats, convert back.
        outx = _convertback(xisfloat, xislist, xistuple, inx)
        outy = _convertback(yisfloat, yislist, xistuple, iny)
        outz = _convertback(zisfloat, zislist, zistuple, inz)
        return outx, outy, outz

----------
        lons: array, :class:`numpy.ndarray`, list, tuple, or scalar
            The longitude points along a line.
        lats: array, :class:`numpy.ndarray`, list, tuple, or scalar
            The latitude points along a line.
        radians: bool, optional
            If True, the input data is assumed to be in radians.

        Returns
        -------
        array, :class:`numpy.ndarray`, list, tuple, or scalar:
            The total length of the line.
        """
        # process inputs, making copies that support buffer API.
        inx, xisfloat, xislist, xistuple = _copytobuffer(lons)
        iny, yisfloat, yislist, yistuple = _copytobuffer(lats)
        self._line_length(inx, iny, radians=radians)
        line_lengths = _convertback(xisfloat, xislist, xistuple, inx)
        return line_lengths if xisfloat else line_lengths[:-1]

'-2704026.010 -4253051.810 3895878.820'
        >>> transformer = Transformer.from_proj("epsg:4326", 4326, skip_equivalent=True)
        >>> xeq, yeq = transformer.transform(33, 98)
        >>> "%.0f  %.0f" % (xeq, yeq)
        '33  98'

        """
        # process inputs, making copies that support buffer API.
        inx, xisfloat, xislist, xistuple = _copytobuffer(xx)
        iny, yisfloat, yislist, yistuple = _copytobuffer(yy)
        if zz is not None:
            inz, zisfloat, zislist, zistuple = _copytobuffer(zz)
        else:
            inz = None
        if tt is not None:
            intime, tisfloat, tislist, tistuple = _copytobuffer(tt)
        else:
            intime = None
        # call pj_transform.  inx,iny,inz buffers modified in place.
        self._transformer._transform(
            inx,
            iny,
            inz=inz,
            intime=intime,
            direction=direction,
            radians=radians,
            errcheck=errcheck,
        )
        # if inputs were lists, tuples or floats, convert back.
        outx = _convertback(xisfloat, xislist, xistuple, inx)
        outy = _convertback(yisfloat, yislist, xistuple, iny)
        return_data = (outx, outy)