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The :py:func:`register` function is used to register additional viewers::
from PIL import ImageShow
ImageShow.register(MyViewer()) # MyViewer will be used as a last resort
ImageShow.register(MySecondViewer(), 0) # MySecondViewer will be prioritised
ImageShow.register(ImageShow.XVViewer(), 0) # XVViewer will be prioritised
:param viewer: The viewer to be registered.
:param order:
Zero or a negative integer to prepend this viewer to the list,
a positive integer to append it.
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Display a given image.
:param image: An image object.
:param title: Optional title. Not all viewers can display the title.
:param \**options: Additional viewer options.
:returns: ``True`` if a suitable viewer was found, ``False`` otherwise.
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The main function for displaying an image.
Converts the given image to the target format and displays it.
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DisplayViewerz`
The ImageMagick ``display`` command.
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gm displayr �r r$ r rC r= r r r rI � � z GmDisplayViewer.get_command_exc K � t �dd|g� dS )r* r] rR r rM r- r r r r( � � zGmDisplayViewer.show_fileNrN r r r r r[ � � r[ c @ rJ )� EogViewerz'The GNOME Image Viewer ``eog`` command.c K r\ )N�eogzeog -nr r^ r r r rI � r_ zEogViewer.get_command_exc K r` )r* rd z-nr rM r- r r r r( � ra zEogViewer.show_fileNrN r r r r rc � rb rc c @ rO )�XVViewerzX
The X Viewer ``xv`` command.
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IPythonViewerz!The viewer for IPython frontends.c K s t |� dS )Nr )�ipython_displayr) r r r r 0 s zIPythonViewer.show_imageN)r/ r0 r1 r2 r r r r r rg - s rg )rR �__main__� z.Syntax: python3 ImageShow.py imagefile [title])r rZ )"r+ rD r@ rB �shlexr � r r r r r r3 �platformr9 rH rK rP r[ rc re rE rg �IPython.displayrR rh � ImportErrorr/ �len�argv�print�exitr> �imr r r r �<module> s`
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