add missing const keyword for memoryviews

jeremiedbb · jeremiedbb · commit 7c8adbf42a6b · 2019-04-12T12:59:19.000+02:00
diff --git a/sklearn/tree/_splitter.pyx b/sklearn/tree/_splitter.pyx
@@ -117,7 +117,7 @@ cdef class Splitter:
 
     cdef int init(self,
                    object X,
-                   DOUBLE_t[:, ::1] y,
+                   const DOUBLE_t[:, ::1] y,
                    DOUBLE_t* sample_weight,
                    np.ndarray X_idx_sorted=None) except -1:
         """Initialize the splitter.
@@ -237,7 +237,7 @@ cdef class Splitter:
 
 
 cdef class BaseDenseSplitter(Splitter):
-    cdef DTYPE_t[:, :] X
+    cdef const DTYPE_t[:, :] X
 
     cdef np.ndarray X_idx_sorted
     cdef INT32_t* X_idx_sorted_ptr
@@ -261,7 +261,7 @@ cdef class BaseDenseSplitter(Splitter):
 
     cdef int init(self,
                   object X,
-                  DOUBLE_t[:, ::1] y,
+                  const DOUBLE_t[:, ::1] y,
                   DOUBLE_t* sample_weight,
                   np.ndarray X_idx_sorted=None) except -1:
         """Initialize the splitter
@@ -877,7 +877,7 @@ cdef class BaseSparseSplitter(Splitter):
 
     cdef int init(self,
                   object X,
-                  DOUBLE_t[:, ::1] y,
+                  const DOUBLE_t[:, ::1] y,
                   DOUBLE_t* sample_weight,
                   np.ndarray X_idx_sorted=None) except -1:
         """Initialize the splitter
