cython

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__doc__ = u"""
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    >>> c = build()
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    >>> c.method()
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    Traceback (most recent call last):
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    AssertionError: 1
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"""
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cdef enum Mode:
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    a = 1
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    b = 2
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cdef class Curseur:
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    cdef Mode mode
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    def method(self):
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        assert False, self.mode
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def build():
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    cdef Curseur c
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    c = Curseur()
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    c.mode = a
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    return c
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