Fix random seed for language model in static mode (#4836)

PaddleNLP/language_model/train.py

@@ -119,7 +119,7 @@ def main():
     main_program = fluid.Program()
     startup_program = fluid.Program()
     if args.enable_ce:
-        startup_program.random_seed = SEED
+        startup_program.random_seed, main_program.random_seed = SEED, SEED
     with fluid.program_guard(main_program, startup_program):
         with fluid.unique_name.guard():
             res_vars = lm_model.lm_model(
@@ -154,6 +154,7 @@ def main():
     # define inference program
     inference_program = fluid.Program()
     inference_startup_program = fluid.Program()
+    inference_program.random_seed, inference_startup_program.radom_seed = SEED, SEED
     with fluid.program_guard(inference_program, inference_startup_program):
         with fluid.unique_name.guard():
             lm_model.lm_model(
@@ -207,6 +208,7 @@ def main():
     else:
         train_program = fluid.compiler.CompiledProgram(main_program)
 
+    train_program.random_seed = SEED
     data_path = args.data_path
     print("begin to load data")
     ptb_data = reader.get_ptb_data(data_path)
@@ -483,3 +485,4 @@ def main():
 
 if __name__ == '__main__':
     main()
+