I have some trouble to document my Cython (python 2.7) module with Sphinx 
(1.7).

I set the Cython directive `embedsignature` to True, and I also mock 
`numpy` in my conf.py file. However, if I run `sphinx-build -b html source 
build` I get the following TypeError:


    WARNING: autodoc: failed to import module u'isolver'; the following 
exception was raised:
    Traceback (most recent call last):
      File 
"C:\Users\xxx\Anaconda2\lib\site-packages\sphinx\ext\autodoc\importer.py", 
line 140, in import_module
        __import__(modname)
      File "c:\users\xxx\dropbox\github\isolver\isolver\__init__.py", line 
1, in <module>
        import core
      File "c:\users\xxx\dropbox\github\isolver\isolver\core\__init__.py", 
line 1, in <module>
        import c_trf
      File "__init__.pxd", line 155, in init isolver.core.c_trf
    TypeError: numpy.dtype is not a type object

The weird thing is I do not have a *.pxd file and line 155 in `c_trf.pyx` 
file is empty.

Perhaps the secret of this error lies in the way how I declared the numpy 
data types?

    cimport numpy as np
    import numpy as np

    DTYPE_int = np.int64
    ctypedef np.int64_t DTYPE_int_t

    DTYPE_float = np.float64
    ctypedef np.float64_t DTYPE_float_t

Or maybe the declarations of some functions with `cdef np.ndarray 
fun(x):...` are wrong?

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