cython fused types problem with spyder user module deleter

fused.pyx

from cython cimport floating

def add_fused(floating [:] ain):
    cdef int r
    for r in range(ain.size):
        ain[r] += 1

def add_f64(double [:] ain):
    cdef int r
    for r in range(ain.size):
        ain[r] += 1

def add_f32(float [:] ain):
    cdef int r
    for r in range(ain.size):
        ain[r] += 1

setup.py

from distutils.core import setup, Extension
from Cython.Build import cythonize

ext_module = Extension(
	"fused",
	["fused.pyx"])

setup(ext_modules = cythonize(ext_module))

test_fused.py

import numpy as np
import fused

a = np.arange(10, dtype=np.float32)
b = np.arange(10, dtype=np.float64)

if 0:
    fused.add_f32(a)
    fused.add_f64(b)
else:
    fused.add_fused(a)
    fused.add_fused(b)

print(a)
print(b)