[CodeStyle][E231] remove unnecessary , (#47297)

Author: SigureMo

python/paddle/fluid/tests/unittests/distributed_passes/ps_pass_test_base.py

@@ -47,7 +47,9 @@ def ps_launch(self, ps_mode="cpu-ps"):
         if ps_mode == "cpu-ps" or ps_mode == 'heter-ps':
             os.environ['WITH_DISTRIBUTE'] = 'ON'
 
-            cmd = [sys.executable, "-u",] + [
+            cmd = [
+                sys.executable,
+                "-u",
                 "-m",
                 "launch",
                 "--log_dir",

python/paddle/fluid/tests/unittests/test_layer_norm_op.py

@@ -106,9 +106,7 @@ def _reference_layer_norm_grad(
     grad_x = dx_end + d_mean + d_std
 
     grad_x.shape, x.shape, grad_y.shape = x_shape, x_shape, x_shape
-    var.shape, mean.shape = [N,], [
-        N,
-    ]
+    var.shape, mean.shape = [N], [N]
 
     if scale is not None:
         scale.shape = scale_shape

python/paddle/fluid/tests/unittests/test_set_value_op.py

@@ -1316,7 +1316,7 @@ def test_consistent_with_competitor(self):
     def test_static_graph(self):
         paddle.enable_static()
 
-        to_string = lambda x, i,: x + '_' + str(i)
+        to_string = lambda x, i: x + '_' + str(i)
         numel = lambda input_shape: reduce(lambda x, y: x * y, input_shape)
 
         def op1(x):