Im trying to initiate a fixed sized array within a cython class so multiple methods can use it. How can that be done?
cdef class My Class:
cdef public np.ndarray[np.float, ndim=1] myarr
def __cinit__(self,int history_length):
self.myarr = np.empty(history_length, dtype=np.float)
I am getting an error saying:
buffer types only allowed as function local variables
Is there a way to declare this and access this?
Thanks
I believe the buffer syntax type[::1] is preferred in cython i.e.
import numpy as np
cimport numpy as np
cdef class MyClass:
cdef float[::1] myarr
def __cinit__(self,int history_length):
self.myarr = np.empty(history_length, dtype=np.float)
Edit: the above code assumes that you define an array continuous in memory, which by default for numpy arrays is the c style (i.e. row continuous). Defining it float[:] would state that you are expecting a float buffer not necessarily continuous.
