cython

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cdef extern from "externsue.h":
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    enum Eggs:
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        runny, firm, hard
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    struct Spam:
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        int i
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    union Soviet:
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        char c
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cdef extern Eggs e
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cdef extern Spam s
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cdef extern Soviet u
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cdef void tomato():
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    global e
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    e = runny
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    e = firm
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    e = hard
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