docs/examples/userguide/extension_types/penguin2.pyx


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cimport cython


@cython.freelist(8)
cdef class Penguin:
    cdef object food
    def __cinit__(self, food):
        self.food = food

penguin = Penguin('fish 1')
penguin = None
penguin = Penguin('fish 2')  # does not need to allocate memory!