Issues with cpdef in jupyter notebook

[Matt Shmukler]

I am running into the following issue using a jupyter notebook:

In one cell I have

%%cython --compile-args=-fopenmp --link-args=-fopenmp --verbose --force

cimport cython
import numpy as np
from cython.parallel cimport prange
cimport scipy.linalg.cython_lapack as lapack
import numpy as np

from libc.math cimport exp

cpdef double complex ensemble(p,df):

      ......

      return ....

In another cell I call this function 

print(ensemble(p,df))

which gives

NameError: name 'ensemble' is not defined