cython

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__doc__ = u"""
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>>> b1 = TestBuffer()
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>>> b2 = TestBufferRelease()
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>>> ms = memoryview(s)
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>>> ms.tobytes()
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b'abcdefg'
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>>> m1 = memoryview(b1)
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__getbuffer__ called
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Semantics changed in python 3.3
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>> m1.tobytes()
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__getbuffer__ called
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b'abcdefg'
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>>> m2 = memoryview(b2)
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__getbuffer__ called
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Semantics changed in python 3.3
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>> m2.tobytes()
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__getbuffer__ called
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releasing!
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b'abcdefg'
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>>> del m1
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>>> del m2
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releasing!
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"""
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s = b"abcdefg"
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cdef class TestBuffer:
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    def __getbuffer__(self, Py_buffer* buffer, int flags):
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        print u"__getbuffer__ called"
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        buffer.buf = <char*>s
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        buffer.obj = self
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        buffer.len = len(s)
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        buffer.readonly = 0
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        buffer.format = "B"
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        buffer.ndim = 0
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        buffer.shape = NULL
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        buffer.strides = NULL
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        buffer.suboffsets = NULL
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        buffer.itemsize = 1
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        buffer.internal = NULL
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cdef class TestBufferRelease(TestBuffer):
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    def __releasebuffer__(self, Py_buffer* buffer):
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        print u"releasing!"
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cdef class TestCompileWithDocstring(object):
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    def __getbuffer__(self, Py_buffer* buffer, int flags):
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        "I am a docstring!"
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    def __releasebuffer__(self, Py_buffer* buf):
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        "I am a docstring!"
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