diff --git a/brainpy/_src/math/op_register/numba_approach/tests/test_numba_approach.py b/brainpy/_src/math/op_register/numba_approach/tests/test_numba_approach.py
index e1bed7de..091468c9 100644
--- a/brainpy/_src/math/op_register/numba_approach/tests/test_numba_approach.py
+++ b/brainpy/_src/math/op_register/numba_approach/tests/test_numba_approach.py
@@ -31,14 +31,14 @@ def eval_shape2(a, b):
   d = ShapedArray(b.shape, dtype=b.dtype)
   return c, d
 
-@numba.njit(parallel=True)
+
 def con_compute2(outs, ins):
-  c = outs[0]  # take out all the outputs
-  d = outs[1]
-  a = ins[0]  # take out all the inputs
-  b = ins[1]
-  # c, d = outs
-  # a, b = ins
+  # c = outs[0]  # take out all the outputs
+  # d = outs[1]
+  # a = ins[0]  # take out all the inputs
+  # b = ins[1]
+  c, d = outs
+  a, b = ins
   c[:] = a + 1
   d[:] = b * 2
 
diff --git a/docs/tutorial_advanced/operator_custom_with_numba.ipynb b/docs/tutorial_advanced/operator_custom_with_numba.ipynb
index e4f8dd20..0b840db0 100644
--- a/docs/tutorial_advanced/operator_custom_with_numba.ipynb
+++ b/docs/tutorial_advanced/operator_custom_with_numba.ipynb
@@ -149,10 +149,8 @@
     "  return c, d\n",
     "\n",
     "def con_compute2(outs, ins):\n",
-    "  c = outs[0]  # take out all the outputs\n",
-    "  d = outs[1]\n",
-    "  a = ins[0]  # take out all the inputs\n",
-    "  b = ins[1]\n",
+    "  c, d = outs # take out all the outputs\n",
+    "  a, b = ins  # take out all the inputs\n",
     "  c[:] = a + 1\n",
     "  d[:] = a * 2\n",
     "\n",
@@ -193,8 +191,7 @@
     "\n",
     "def con_compute3(outs, ins):\n",
     "  c = outs  # Take out all the outputs\n",
-    "  a = ins[0] # Take out all inputs\n",
-    "  b = ins[1]\n",
+    "  a, b = ins  # Take out all inputs\n",
     "  c[:] = 2.\n",
     "\n",
     "op3 = bm.CustomOpByNumba(eval_shape3, con_compute3, multiple_results=False)\n",
@@ -437,10 +434,8 @@
     "  return c, d  # 返回多个抽象数组信息\n",
     "\n",
     "def con_compute2(outs, ins):\n",
-    "  c = outs[0]  # 取出所有的输出\n",
-    "  d = outs[1]\n",
-    "  a = ins[0]  # 取出所有的输入\n",
-    "  b = ins[1]\n",
+    "  c, d = outs  # 取出所有的输出\n",
+    "  a, b = ins  # 取出所有的输入\n",
     "  c[:] = a + 1\n",
     "  d[:] = a * 2\n",
     "\n",
@@ -481,8 +476,7 @@
     "\n",
     "def con_compute3(outs, ins):\n",
     "  c = outs  # 取出所有的输出\n",
-    "  a = ins[0] # 取出所有的输入\n",
-    "  b = ins[1]\n",
+    "  a, b = ins # 取出所有的输入\n",
     "  c[:] = 2.\n",
     "\n",
     "op3 = bm.CustomOpByNumba(eval_shape3, con_compute3, multiple_results=False)\n",