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

Code before:
        :save_last_frame:

        polarplane_pi = PolarPlane(azimuth_units="PI radians", size=6, azimuth_label_scale=0.75, radius_config={'number_scale_value': 0.75}).add_coordinates()

        class PolarPlaneExample(Scene):
            def construct(self):
                self.add(polarplane_pi)
    """

    def __init__(
        self,
        radius_max: Optional[float] = config["frame_y_radius"],
        size: Optional[float] = None,
        radius_step: Optional[float] = 1,
        azimuth_step: Optional[float] = None,
        azimuth_units: Optional[Union[str, None]] = "PI radians",
        azimuth_compact_fraction: Optional[bool] = True,
        azimuth_offset: Optional[float] = 0,
        azimuth_direction: Optional[str] = "CCW",
        azimuth_label_buff: Optional[float] = SMALL_BUFF,
        azimuth_label_scale: Optional[float] = 0.5,
        radius_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: Optional[bool] = True,
        **kwargs,
    ):

        # error catching
        if azimuth_units in ["PI radians", "TAU radians", "degrees", "gradians", None]:
            self.azimuth_units = azimuth_units
        else:
            raise ValueError(
                "Invalid azimuth units. Expected one of: PI radians, TAU radians, degrees, gradians or None."
            )

        if azimuth_direction in ["CW", "CCW"]:
            self.azimuth_direction = azimuth_direction
        else:
            raise ValueError("Invalid azimuth units. Expected one of: CW, CCW.")

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

Review comment (suggestion):
```suggestion
        faded_line_ratio: int = 1,
        make_smooth_after_applying_functions: bool = True,
```

Code after:
    azimuth_label_scale
        The scale of the azimuth labels.

    radius_config
        The axis config for the radius.

    Examples
    --------

    .. manim:: PolarPlaneExample
        :ref_classes: PolarPlane
        :save_last_frame:

        class PolarPlaneExample(Scene):
            def construct(self):
                polarplane_pi = PolarPlane(
                    azimuth_units="PI radians",
                    size=6,
                    azimuth_label_scale=0.7,
                    radius_config={"number_scale_value": 0.7},
                ).add_coordinates()
                self.add(polarplane_pi)
    """

    def __init__(
        self,
        radius_max: float = config["frame_y_radius"],
        size: Optional[float] = None,
        radius_step: float = 1,
        azimuth_step: Optional[float] = None,
        azimuth_units: Optional[str] = "PI radians",
        azimuth_compact_fraction: bool = True,
        azimuth_offset: float = 0,
        azimuth_direction: str = "CCW",
        azimuth_label_buff: float = SMALL_BUFF,
        azimuth_label_scale: float = 0.5,
        radius_config: Optional[dict] = None,
        background_line_style: Optional[dict] = None,
        faded_line_style: Optional[dict] = None,
        faded_line_ratio: int = 1,
        make_smooth_after_applying_functions: bool = True,
        **kwargs,
    ):

        # error catching
        if azimuth_units in ["PI radians", "TAU radians", "degrees", "gradians", None]:
            self.azimuth_units = azimuth_units
        else:
            raise ValueError(
                "Invalid azimuth units. Expected one of: PI radians, TAU radians, degrees, gradians or None."
            )