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        "description": "A helper / hack to allow us to cast a ``mmap.mmap`` or other buffer to\na Cython pointer of the correct type.\n\nCython is capable of casting a lot of things to a C pointer of the\ncorrect type, especially with the aid of ``memoryview``. However,\nin Python 2, ``memoryview`` lacks the ``memoryview.cast`` method\n(so Cython won't let us change the dimensions of the array). Further,\nboth Python 2 and 3 require the memory map to be writable (making\nthe pointer type ``const`` does not seem to help here either).\n\nThis class takes a (possibly read-only) memmap object, and produces a\nPython object with a ``__getbuffer__`` method that returns The Right Thing.\n*It pretends that the underlying buffer is writable* to make Cython\nhappy. If you give it a read-only buffer, and try to write to the result,\nthen you will have a bad time.\n\nWhen a Python object is cast by Cython to a pointer, it holds a\nreference to the underlying Python object in order to prevent the\nmemory to which it refers being garbage collected. The ``MagicMemoryView``\nin turn keeps a reference to the underlying data, so everything should\nbehave as expected.\n\nUsage::\n\n    from magicmemoryview import MagicMemoryView\n\n    cdef double data[:, :, :]\n\n    data = MagicMemoryView(source_buffer, (24, 12, 25), \"d\")",
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