diff --git a/mindspore/ccsrc/transform/express_ir/onnx_exporter.cc b/mindspore/ccsrc/transform/express_ir/onnx_exporter.cc
index 94bb67f24a7..440b3c720b1 100644
--- a/mindspore/ccsrc/transform/express_ir/onnx_exporter.cc
+++ b/mindspore/ccsrc/transform/express_ir/onnx_exporter.cc
@@ -665,8 +665,8 @@ std::vector<size_t> TraceLoopToControlMap(const FuncGraphPtr &control_subgraph)
   auto switch_node = FindLoopSwitchNode(control_subgraph);
   auto loop_partial_node = GetNodeInput<CNode>(switch_node, kTwoNum);
   const auto &control_params = control_subgraph->parameters();
-  size_t auxiliary_inputs_num = 2;
-  for (size_t i = auxiliary_inputs_num; i < loop_partial_node->inputs().size(); ++i) {
+  int64_t auxiliary_inputs_num = 2;
+  for (size_t i = static_cast<unsigned int>(auxiliary_inputs_num); i < loop_partial_node->inputs().size(); ++i) {
     auto loop_param = GetNodeInput<Parameter>(loop_partial_node, i);
     auto control_param_pos =
       std::find(control_params.begin(), control_params.end(), loop_param) - control_params.begin();
@@ -683,8 +683,8 @@ std::vector<size_t> TraceAfterToLoopMap(const FuncGraphPtr &control_subgraph) {
   auto loop_partial_node = GetNodeInput<CNode>(switch_node, kTwoNum);
   auto after_partial_node = GetNodeInput<CNode>(switch_node, kThreeNum);
   const auto &loop_params = loop_partial_node->inputs();
-  size_t auxiliary_inputs_num = 2;
-  for (size_t i = auxiliary_inputs_num; i < after_partial_node->inputs().size(); ++i) {
+  int64_t auxiliary_inputs_num = 2;
+  for (size_t i = static_cast<unsigned int>(auxiliary_inputs_num); i < after_partial_node->inputs().size(); ++i) {
     auto after_param = GetNodeInput<Parameter>(after_partial_node, i);
     auto after_param_pos = std::find(loop_params.begin(), loop_params.end(), after_param) - loop_params.begin();
     result.push_back(after_param_pos - auxiliary_inputs_num);
@@ -1675,7 +1675,7 @@ void OnnxExporter::ExportPrimStridedSlice(const FuncGraphPtr &, const CNodePtr &
   const auto &x_shape = dyn_cast<abstract::Shape>(node->input(kOneNum)->Shape())->shape();
   auto end_ignore_mask = GetOpAttribute<int64_t>(node, "end_mask");
   for (size_t i = 0; i < end_value.size(); ++i) {
-    if ((end_ignore_mask & (1 << i)) != 0) {
+    if (((unsigned int)end_ignore_mask & (1 << i)) != 0) {
       end_value[i] = x_shape[i];
     }
   }
diff --git a/mindspore/ccsrc/transform/graph_ir/convert.cc b/mindspore/ccsrc/transform/graph_ir/convert.cc
index aef354a60c2..fb3aed1a68a 100644
--- a/mindspore/ccsrc/transform/graph_ir/convert.cc
+++ b/mindspore/ccsrc/transform/graph_ir/convert.cc
@@ -865,7 +865,7 @@ std::vector<Operator> DfGraphConvertor::GetWhileBodyOutputs() {
     }
 
     if (j->isa<Parameter>()) {
-      size_t idx = find(inputs_.begin(), inputs_.end(), j) - inputs_.begin();
+      int64_t idx = find(inputs_.begin(), inputs_.end(), j) - inputs_.begin();
       auto idx_cond = body_cond_map_[idx];
       if (while_used_input_index_.find(idx_cond) == while_used_input_index_.end() ||
           while_const_input_index_.find(idx_cond) != while_const_input_index_.end()) {
@@ -1140,7 +1140,7 @@ void DfGraphConvertor::SetParamIndexMap(const std::vector<AnfNodePtr> &graphs) {
 
   for (size_t i = 0; i < body_params.size(); i++) {
     auto p = body_params[i];
-    size_t idx = find(cond_params.begin(), cond_params.end(), p) - cond_params.begin();
+    int64_t idx = find(cond_params.begin(), cond_params.end(), p) - cond_params.begin();
     body_cond_map_[i] = idx;
     MS_LOG(DEBUG) << "body_cond_map_'s key: " << i << " value: " << idx;
   }
@@ -1157,7 +1157,7 @@ void DfGraphConvertor::SetParamIndexMap(const std::vector<AnfNodePtr> &graphs) {
 
   for (size_t i = 0; i < after_params.size(); i++) {
     auto p = after_params[i];
-    size_t idx = find(cond_params.begin(), cond_params.end(), p) - cond_params.begin();
+    int64_t idx = find(cond_params.begin(), cond_params.end(), p) - cond_params.begin();
     after_cond_map_[i] = idx;
     MS_LOG(DEBUG) << "after_cond_map_'s key: " << i << " value: " << idx;
   }
diff --git a/mindspore/python/mindspore/train/model.py b/mindspore/python/mindspore/train/model.py
index 3e9e3ce9ec5..154bbf5807c 100644
--- a/mindspore/python/mindspore/train/model.py
+++ b/mindspore/python/mindspore/train/model.py
@@ -47,6 +47,7 @@ from . import amp
 from ..common.api import _pynative_executor
 from ..dataset.engine.datasets import _set_training_dataset, _reset_training_dataset
 
+
 def _transfer_tensor_to_tuple(inputs):
     """
     If the input is a tensor, convert it to a tuple. If not, the output is unchanged.
@@ -71,7 +72,7 @@ def _save_final_ckpt(func):
     def wrapper(self, *args, **kwargs):
         obj = None
         if kwargs.get('callbacks') and isinstance(kwargs.get('callbacks'), ModelCheckpoint):
-            obj = kwargs['callbacks']
+            obj = kwargs.get('callbacks')
         if kwargs.get('callbacks') and isinstance(kwargs.get('callbacks'), list):
             for item in kwargs.get('callbacks'):
                 if isinstance(item, ModelCheckpoint):