cython

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import cython
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@cython.cclass
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class A:
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    cython.declare(a=cython.int, b=cython.int)
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    c = cython.declare(cython.int, visibility='public')
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    d = cython.declare(cython.int)  # private by default.
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    e = cython.declare(cython.int, visibility='readonly')
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    def __init__(self, a, b, c, d=5, e=3):
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        self.a = a
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        self.b = b
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        self.c = c
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        self.d = d
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        self.e = e
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