--- a
+++ b/darkflow/cython_utils/nms.pxd
@@ -0,0 +1,9 @@
+import numpy as np
+cimport numpy as np
+cimport cython
+ctypedef np.float_t DTYPE_t
+from libc.math cimport exp
+from utils.box import BoundBox
+
+
+cdef NMS(float[:, ::1] , float[:, ::1] )