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47 lines
1.2 KiB
ReStructuredText
47 lines
1.2 KiB
ReStructuredText
.. py:module:: PIL.PyAccess
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.. py:currentmodule:: PIL.PyAccess
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:py:mod:`~PIL.PyAccess` Module
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==============================
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The :py:mod:`~PIL.PyAccess` module provides a CFFI/Python implementation of the :ref:`PixelAccess`. This implementation is far faster on PyPy than the PixelAccess version.
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.. note:: Accessing individual pixels is fairly slow. If you are
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looping over all of the pixels in an image, there is likely
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a faster way using other parts of the Pillow API.
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:mod:`~PIL.Image`, :mod:`~PIL.ImageChops` and :mod:`~PIL.ImageOps`
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have methods for many standard operations. If you wish to perform
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a custom mapping, check out :py:meth:`~PIL.Image.Image.point`.
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Example
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-------
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The following script loads an image, accesses one pixel from it, then changes it. ::
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from PIL import Image
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with Image.open("hopper.jpg") as im:
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px = im.load()
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print(px[4, 4])
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px[4, 4] = (0, 0, 0)
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print(px[4, 4])
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Results in the following::
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(23, 24, 68)
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(0, 0, 0)
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Access using negative indexes is also possible. ::
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px[-1, -1] = (0, 0, 0)
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print(px[-1, -1])
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:py:class:`PyAccess` Class
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--------------------------
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.. autoclass:: PIL.PyAccess.PyAccess()
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:members:
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