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gh-95371: Add support for other image formats(e.g. PNG) to the turtle… (#95378)

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Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>
Co-authored-by: blurb-it[bot] <43283697+blurb-it[bot]@users.noreply.github.com>
Co-authored-by: Oleg Iarygin <oleg@arhadthedev.net>
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Shin-myoung-serp 2025-01-02 18:45:07 +09:00 • committed by GitHub
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commit e1baa778f6
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3 changed files with 34 additions and 21 deletions
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30
Lib/turtle.py
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@ -51,7 +51,7 @@ Roughly it has the following features added:
turtle. So the turtles can more easily be used as a visual feedback
instrument by the (beginning) programmer.
- Different turtle shapes, gif-images as turtle shapes, user defined
- Different turtle shapes, image files as turtle shapes, user defined
and user controllable turtle shapes, among them compound
(multicolored) shapes. Turtle shapes can be stretched and tilted, which
makes turtles very versatile geometrical objects.
@ -468,7 +468,7 @@ class TurtleScreenBase(object):
def _image(self, filename):
"""return an image object containing the
imagedata from a gif-file named filename.
imagedata from an image file named filename.
"""
return TK.PhotoImage(file=filename, master=self.cv)
@ -872,10 +872,7 @@ class Shape(object):
if isinstance(data, list):
data = tuple(data)
elif type_ == "image":
if isinstance(data, str):
if data.lower().endswith(".gif") and isfile(data):
data = TurtleScreen._image(data)
# else data assumed to be PhotoImage
assert(isinstance(data, TK.PhotoImage))
elif type_ == "compound":
data = []
else:
@ -1100,14 +1097,18 @@ class TurtleScreen(TurtleScreenBase):
"""Adds a turtle shape to TurtleScreen's shapelist.
Arguments:
(1) name is the name of a gif-file and shape is None.
(1) name is the name of an image file (PNG, GIF, PGM, and PPM) and shape is None.
Installs the corresponding image shape.
!! Image-shapes DO NOT rotate when turning the turtle,
!! so they do not display the heading of the turtle!
(2) name is an arbitrary string and shape is a tuple
(2) name is an arbitrary string and shape is the name of an image file (PNG, GIF, PGM, and PPM).
Installs the corresponding image shape.
!! Image-shapes DO NOT rotate when turning the turtle,
!! so they do not display the heading of the turtle!
(3) name is an arbitrary string and shape is a tuple
of pairs of coordinates. Installs the corresponding
polygon shape
(3) name is an arbitrary string and shape is a
(4) name is an arbitrary string and shape is a
(compound) Shape object. Installs the corresponding
compound shape.
To use a shape, you have to issue the command shape(shapename).
@ -1120,12 +1121,9 @@ class TurtleScreen(TurtleScreenBase):
"""
if shape is None:
# image
if name.lower().endswith(".gif"):
shape = Shape("image", self._image(name))
else:
raise TurtleGraphicsError("Bad arguments for register_shape.\n"
+ "Use help(register_shape)" )
shape = Shape("image", self._image(name))
elif isinstance(shape, str):
shape = Shape("image", self._image(shape))
elif isinstance(shape, tuple):
shape = Shape("polygon", shape)
## else shape assumed to be Shape-instance
@ -1454,7 +1452,7 @@ class TurtleScreen(TurtleScreenBase):
"""Set background image or return name of current backgroundimage.
Optional argument:
picname -- a string, name of a gif-file or "nopic".
picname -- a string, name of an image file (PNG, GIF, PGM, and PPM) or "nopic".
If picname is a filename, set the corresponding image as background.
If picname is "nopic", delete backgroundimage, if present.