Repository: ManimCommunity/manim
File: manim/mobject/coordinate_systems.py (Python)

Code before:
        Arguments to be passed to :class:`~.NumberLine` that influences both axes.
    y_axis_config
        Arguments to be passed to :class:`~.NumberLine` that influence the y-axis.
    background_line_style
        Arguments that influence the construction of the background lines of the plane.
    faded_line_style
        Similar to :attr:`background_line_style`, affects the construction of the scene's background lines.
    faded_line_ratio
        Determines the number of boxes within the background lines: :code:`2` = 4 boxes, :code:`3` = 9 boxes.
    make_smooth_after_applying_functions
        Currently non-functional.
    kwargs : Any
        Additional arguments to be passed to :class:`Axes`.

    .. note:: If :attr:`x_length` or :attr:`y_length` are not defined, the plane automatically adjusts its lengths based
        on the :attr:`x_range` and :attr:`y_range` values to set the unit_size to 1.
    """

    def __init__(
        self,
        x_range: Optional[Union[Sequence[int], np.ndarray]] = (
            -config["frame_x_radius"],
            config["frame_x_radius"],
            1,
        ),
        y_range: Optional[Union[Sequence[int], np.ndarray]] = (
            -config["frame_y_radius"],
            config["frame_y_radius"],
            1,
        ),
        x_length: Optional[float] = None,
        y_length: Optional[float] = None,
        axis_config: Optional[dict] = None,
        y_axis_config: Optional[dict] = None,
        background_line_style: Optional[dict] = None,
        faded_line_style: Optional[dict] = None,
        faded_line_ratio: Optional[int] = 1,
        make_smooth_after_applying_functions=True,
        **kwargs,
    ):

        # configs
        self.axis_config = {
            "stroke_color": WHITE,
            "stroke_width": 2,
            "include_ticks": False,
            "include_tip": False,
            "line_to_number_buff": SMALL_BUFF,
            "label_direction": DR,
            "number_scale_value": 0.5,
        }

Review comment (suggestion):
```suggestion
        y_range: Optional[Union[List[float], np.ndarray]] = (
```

Code after:
                        ],
                    )
                )
            )

            rect = Rectangle().replace(points, stretch=True)
            rectangles.add(rect)

            # checks if the rectangle is under the x-axis
            if self.p2c(graph_point)[1] < y_point and show_signed_area:
                color = invert_color(color)

            # blends rectangles smoothly
            if blend:
                stroke_color = color

            rect.set_style(
                fill_color=color,
                fill_opacity=fill_opacity,
                stroke_color=stroke_color,
                stroke_width=stroke_width,
            )

        return rectangles

    def get_area(
        self,
        graph: "ParametricFunction",
        x_range: Optional[Sequence[float]] = None,
        color: Union[Color, Iterable[Color]] = [BLUE, GREEN],
        opacity: float = 0.3,
        dx_scaling: float = 1,
        bounded: "ParametricFunction" = None,
    ):
        """Returns a :class:`~.VGroup` of Riemann rectangles sufficiently small enough to visually
        approximate the area under the graph passed.

        Parameters
        ----------
        graph
            The graph/curve for which the area needs to be gotten.

        x_range
            The range of the minimum and maximum x-values of the area. ``x_range = [x_min, x_max]``.

        color
            The color of the area. Creates a gradient if a list of colors is provided.

        opacity
            The opacity of the area.