python craziness

class f:
    def __init__( self, f ): self.f = f

class v:
    def f( self ): return f( self )

print v()
print v().f()
print v().f().f

Output:

<__main__.v instance at 0x006B7120>
<__main__.f instance at 0x006B7148>
<__main__.v instance at 0x006B7148>