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Container classes for `.Artist`\s.

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    The base of all container artists defined in this module.

`AnchoredOffsetbox`, `AnchoredText`
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    axes or a specific anchor point.

`DrawingArea`
    A container with fixed width and height. Children have a fixed position
    inside the container and may be clipped.

`HPacker`, `VPacker`
    Containers for layouting their children vertically or horizontally.

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      box may be further to the right than the returned total.

    - 'expand': Distribute the boxes with equal spacing so that the left edge
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    Parameters
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    widths : list of float
        Widths of boxes to be packed.
    total : float or None
        Intended total length. *None* if not used.
    sep : float or None
        Spacing between boxes.
    mode : {'fixed', 'expand', 'equal'}
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        List of (y0, y1) spans of boxes to be aligned.
    height : float or None
        Intended total height. If None, the maximum of the heights
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        Returns
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            Whether any values are within the radius.
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