Optimized error reporting information (#19173)

* test=develop,Optimized error reporting information

* test=develop,add importscipy unittest

* test=develop, rename the file and function

python/paddle/__init__.py

@@ -11,6 +11,11 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+import os
+from paddle.check_import_scipy import check_import_scipy
+
+check_import_scipy(os.name)
+
 try:
     from paddle.version import full_version as __version__
     from paddle.version import commit as __git_commit__

python/paddle/check_import_scipy.py

@@ -0,0 +1,29 @@
+# Copyright (c) 2019 PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+def check_import_scipy(OsName):
+    print_info = ""
+    if OsName == 'nt':
+        try:
+            import scipy.io as scio
+        except ImportError as e:
+            print_info = str(e)
+        if (len(print_info) > 0):
+            if 'DLL load failed' in print_info:
+                raise ImportError(
+                    print_info +
+                    "\nplease download visual C++ Redistributable for vs 2015, https://www.microsoft.com/en-us/download/details.aspx?id=48145"
+                )
+    return

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

@@ -0,0 +1,33 @@
+# Copyright (c) 2019 PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#import paddle
+#from paddle.importScipy import funcImportScipy
+import six.moves.builtins as builtins
+from paddle.check_import_scipy import check_import_scipy
+import unittest
+
+
+def my_import(name, globals=None, locals=None, fromlist=(), level=0):
+    raise ImportError('DLL load failed,unittest: import scipy  failed')
+
+
+class importTest(unittest.TestCase):
+    def test_import(self):
+        testOsName = 'nt'
+        builtins.__import__ = my_import
+        self.assertRaises(ImportError, check_import_scipy, testOsName)
+
+
+if __name__ == '__main__':
+    unittest.main()