1__doc__ = u"""
2    >>> c1 = C1()
3    >>> c2 = C2(c1)
4    >>> c1 is c2.getc1()
5    True
6"""
7
8cdef class C1:
9    pass
10
11cdef class C2:
12    cdef C1 c1
13
14    def __init__(self, arg):
15        self.c1 = arg
16
17    def getc1(self):
18        return self.c1
19