differnet object types in object block

Author: minggli

pandas/core/missing.py

@@ -54,7 +54,12 @@ def mask_missing(arr, values_to_mask):
             if is_numeric_v_string_like(arr, x):
                 mask = False
             elif arr.dtype.kind == 'O':
-                mask = np.array([i == x.tolist() for i in arr.ravel()])
+                try:
+                    m = [i == x.tolist() for i in arr.ravel()]
+                except AttributeError:
+                    m = [i == x for i in arr.ravel()]
+                finally:
+                    mask = np.array(m, dtype=bool)
             else:
                 mask = arr == x
 
@@ -68,7 +73,12 @@ def mask_missing(arr, values_to_mask):
             if is_numeric_v_string_like(arr, x):
                 mask |= False
             elif arr.dtype.kind == 'O':
-                mask |= np.array([i == x.tolist() for i in arr.ravel()])
+                try:
+                    m = [i == x.tolist() for i in arr.ravel()]
+                except AttributeError:
+                    m = [i == x for i in arr.ravel()]
+                finally:
+                    mask |= np.array(m, dtype=bool)
             else:
                 mask |= arr == x