fix used before assign

Author: Jiangxinz

python/paddle/fluid/tests/unittests/mkldnn/test_fusion_gru_bf16_mkldnn_op.py

@@ -98,13 +98,14 @@ def setUp(self):
         if self.with_bias:
             self.inputs['Bias'] = bias
 
+        h0_bf16 = convert_float_to_uint16(h0_fp32)
+
         if self.with_h0:
             if self.weights_dtype == 'bf16':
                 self.inputs['H0'] = h0_bf16
             elif self.weights_dtype == 'fp32':
                 self.inputs['H0'] = h0_fp32
 
-        h0_bf16 = convert_float_to_uint16(h0_fp32)
         self.outputs = {'Hidden': (hidden, self.lod)}
 
         self.attrs = {

python/paddle/fluid/tests/unittests/test_hdfs1.py

@@ -39,14 +39,14 @@ def test_timeout(self):
         fs.mkdirs(dst)
         fs.mkdirs(dst + "/" + src)
         output = ""
+        cmd = "{} -mv {} {}".format(fs._base_cmd, src, dst)
         try:
             fs.mv(src, dst, test_exists=False)
             self.assertFalse(1, "can't execute cmd:{} output:{}".format(cmd,
                                                                         output))
         except FSTimeOut as e:
             print("execute mv {} to {} timeout".format(src, dst))
 
-        cmd = "{} -mv {} {}".format(fs._base_cmd, src, dst)
         ret, output = fluid.core.shell_execute_cmd(cmd, 6 * 1000, 2 * 1000)
         self.assertNotEqual(ret, 0)
         print("second mv ret:{} output:{}".format(ret, output))