Hi,
I'm totally out of ideas with this one. I have a Cython class defined in
.pyx and .pxd files like this:

#foo.pxd

cdef class Foo:
    cdef float n[3]

#foo.pyx

cdef class Foo:
    def __init__(self, float a=0.0, float b=0.0, float c=0.0):
         self.n[0] = a
         self.n[1] = b
         self.n[2] = c



The problem is that when I try to import and initialize a Foo object, I get
the following error:

>>> from foo import Foo
>>> f = Foo()

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "foo.pyx", line 3, in foo.Foo.__init__ (foo.c:701)
    self.n[0] = a
AttributeError: 'foo.Foo' object has no attribute 'n'



I've tried all kinds of crazy stuff trying to fix this and I found a strange
thing: When I copy foo.pxd and foo.pyx to another folder and build them from
that path, they work and I get no errors at all. What could cause something
like this?
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