fix save_dygraph & save with nonexistent dir (#22266)

* fix save_dygraph with nonexistent dir
test=develop

* minor fix
test=develop

* fix unittest
test=develop

* fix static save
test=develop

python/paddle/fluid/dygraph/checkpoint.py

@@ -82,7 +82,12 @@ def save_dygraph(state_dict, model_path):
         name_table[k] = v.name
     model_dict["StructuredToParameterName@@"] = name_table
 
-    with open(model_path + suffix, 'wb') as f:
+    file_name = model_path + suffix
+    dir_name = os.path.dirname(file_name)
+    if dir_name and not os.path.exists(dir_name):
+        os.makedirs(dir_name)
+
+    with open(file_name, 'wb') as f:
         pickle.dump(model_dict, f)
 
 
@@ -113,7 +118,7 @@ def load_dygraph(model_path, keep_name_table=False):
                 adam = fluid.optimizer.Adam( learning_rate = fluid.layers.noam_decay( 100, 10000),
                                              parameter_list = emb.parameters() )
                 state_dict = adam.state_dict()
-                fluid.save_dygraph( state_dict, "padle_dy")
+                fluid.save_dygraph( state_dict, "paddle_dy")
 
                 para_state_dict, opti_state_dict = fluid.load_dygraph( "paddle_dy")
 

python/paddle/fluid/io.py

@@ -1518,6 +1518,10 @@ def save(program, model_path):
     assert base_name != "", \
         "model_path MUST be format of dirname/filename [dirname\\filename in Window], Now filename is empty str"
 
+    dir_name = os.path.dirname(model_path)
+    if dir_name and not os.path.exists(dir_name):
+        os.makedirs(dir_name)
+
     def get_tensor(var):
         t = global_scope().find_var(var.name).get_tensor()
         return np.array(t)

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

@@ -14,6 +14,7 @@
 
 from __future__ import print_function
 
+import os
 import unittest
 import paddle.fluid as fluid
 import paddle.fluid.core as core
@@ -879,9 +880,10 @@ class TestDygraphPtbRnn(unittest.TestCase):
         with fluid.dygraph.guard():
             emb = fluid.dygraph.Embedding([10, 10])
             state_dict = emb.state_dict()
-            fluid.save_dygraph(state_dict, "emb_dy")
+            fluid.save_dygraph(state_dict, os.path.join('saved_dy', 'emb_dy'))
 
-            para_state_dict, opti_state_dict = fluid.load_dygraph("emb_dy")
+            para_state_dict, opti_state_dict = fluid.load_dygraph(
+                os.path.join('saved_dy', 'emb_dy'))
 
             self.assertTrue(opti_state_dict == None)
 

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

@@ -609,7 +609,7 @@ class TestProgramStatePartial(unittest.TestCase):
                     self.assertTrue(np.sum(np.abs(t)) != 0)
                     base_map[var.name] = t
 
-            fluid.save(main_program, "./test_1")
+            fluid.save(main_program, os.path.join('some_dir', 'test_1'))
 
             # set var to zero
             for var in main_program.list_vars():
@@ -623,7 +623,8 @@ class TestProgramStatePartial(unittest.TestCase):
                     self.assertTrue(np.sum(np.abs(new_t)) == 0)
 
             #fluid.load(test_program, "./test_1", None )
-            program_state = fluid.load_program_state("./test_1")
+            program_state = fluid.load_program_state(
+                os.path.join('some_dir', 'test_1'))
             fluid.set_program_state(test_program, program_state)
 
             for var in test_program.list_vars():