How to use the pyproj.Transformer.from_crs function in pyproj

def test_transformer__operations():
    transformer = Transformer.from_crs(28356, 7856)
    assert [op.name for op in transformer.operations] == [
        "Inverse of Map Grid of Australia zone 56",
        "GDA94 to GDA2020 (1)",
        "Map Grid of Australia zone 56",
    ]

def test_transformer__operations_missing():
    assert Transformer.from_crs(7789, 8401).operations == ()

def test_to_wkt():
    transformer = Transformer.from_crs(4326, 3857)
    assert transformer.to_wkt().startswith(
        'CONVERSION["Popular Visualisation Pseudo-Mercator"'
    )

def test_transform_direction__string_lowercase():
    forward_transformer = Transformer.from_crs(4326, 3857)
    inverse_transformer = Transformer.from_crs(3857, 4326)
    assert inverse_transformer.transform(
        -33, 24, direction="inverse"
    ) == forward_transformer.transform(-33, 24, direction="forward")
    ident_transformer = Transformer.from_crs(4326, 3857)
    ident_transformer.transform(-33, 24, direction="ident") == (-33, 24)

def test_repr():
    assert repr(Transformer.from_crs(7789, 8401)) == (
        "\n"
        "Description: ITRF2014 to ETRF2014 (1)\n"
        "Area of Use:\n"
        "- name: Europe - ETRS89\n"
        "- bounds: (-16.1, 32.88, 40.18, 84.17)"
    )

    assert repr(Transformer.from_crs(4326, 3857)) == (
        "\n"
        "Description: Popular Visualisation Pseudo-Mercator\n"
        "Area of Use:\n"
        "- name: World\n"
        "- bounds: (-180.0, -90.0, 180.0, 90.0)"
    )

    assert repr(Transformer.from_crs(4326, 26917)) == (

def _reproject(geo, from_proj, to_proj):
    if from_proj != to_proj:
        from_proj = get_proj(from_proj)
        to_proj = get_proj(to_proj)
        tfm = pyproj.Transformer.from_crs(from_proj, to_proj, always_xy=True)
        return ops.transform(tfm.transform, geo)
    return geo

def _reproject(self, geometry, from_proj=None, to_proj=None):
        if from_proj is None:
            from_proj = self._default_proj
        if to_proj is None:
            to_proj = self.proj if self.proj is not None else "EPSG:4326"
        tfm = pyproj.Transformer.from_crs(get_proj(from_proj), get_proj(to_proj), always_xy=True)
        return ops.transform(tfm.transform, geometry)