Tkinter入门
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# Options

The arc item supports the following options, via the `create_arc` method, and the `itemconfig` and `itemcget` configuration methods.

Table 14-1. Canvas Arc Options

Option | Type | Description
--- | --- | ---
`style` | constant | Specifies how to draw the arc item (see above). Use one of `PIESLICE`, `CHORD`, or `ARC`. The default is `PIESLICE`. These constants are not defined in Python 1.5.2 and earlier. For compatibility, use the strings "pieslice", "chord", and "arc" instead.
`start, extent` | angle | The arc is drawn from the start angle (measured counter-clockwise from three o'clock) to the start angle plus the extent. Both angles are given in degrees, and can be negative. By default, the arc starts at 0.0 degrees (three o'clock), and extends 90.0 degrees counter-clockwise (twelve o'clock).
`fill` | color | The color to use for the arc's interior. If an empty string is given, the interior is not drawn. Note that arc's having the `arc` style cannot be filled. Default is empty (transparent).
`stipple` | bitmap | The name of a bitmap which is used as a stipple brush when filling the arc's interior. Typical values are "gray12", "gray25", "gray50", or "gray75". Default is a solid brush (no bitmap). As of Tk 8.0p2, the stipple option is ignored on the Windows platform. To draw stippled pieslices or chords, you have to create corresponding polygons.
`outline` | color | The color to use for the arc's outline. If an empty string is given, the outline is not drawn. Default is "black".
`outlinestipple` | bitmap | The name of a bitmap which is used as a stipple brush when drawing the arc's outline. Typical values are "gray12", "gray25", "gray50", or "gray75". Default is a solid brush (no bitmap).
`width` | distance | The width of the arc's outline. Default is 1 pixel.
`tags` | tuple | One or more tags to associate with this item. If only a single tag is to be used, you can use a single string instead of a tuple of strings.

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