diff options
author | 2017-09-19 15:58:04 -0700 | |
---|---|---|
committer | 2017-09-19 16:02:20 -0700 | |
commit | ff95455262f8fd97710c57cda4dd2e9055732f3d (patch) | |
tree | 64f2b2c1e5e91bac7cc59a17bb892183b670ea36 /tensorflow/python/platform | |
parent | 76293c2d5f9a3759c553cbb07d20729a242326a7 (diff) |
Add a platform-dependent self-check that runs during `import tensorflow`.
This gives us the opportunity to raise actionable error messages (e.g. about
missing DLLs on Windows) that are more useful than the loader errors we get
from a failed SWIG import.
PiperOrigin-RevId: 169315291
Diffstat (limited to 'tensorflow/python/platform')
-rw-r--r-- | tensorflow/python/platform/self_check.py | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/tensorflow/python/platform/self_check.py b/tensorflow/python/platform/self_check.py new file mode 100644 index 0000000000..0a8fc07901 --- /dev/null +++ b/tensorflow/python/platform/self_check.py @@ -0,0 +1,49 @@ +# Copyright 2017 The TensorFlow 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. +# ============================================================================== + +"""Platform-specific code for checking the integrity of the TensorFlow build.""" +from __future__ import absolute_import +from __future__ import division +from __future__ import print_function + +import os + + +def preload_check(): + """Raises an exception if the environment is not correctly configured. + + Raises: + ImportError: If the check detects that the environment is not correctly + configured, and attempting to load the TensorFlow runtime will fail. + """ + if os.name == "nt": + # Attempt to load any DLLs that the Python extension depends on before + # we load the Python extension, so that we can raise an actionable error + # message if they are not found. + import ctypes # pylint: disable=g-import-not-at-top + try: + ctypes.WinDLL("msvcp140.dll") + except OSError: + raise ImportError( + "Could not find 'msvcp140.dll'. TensorFlow requires that this DLL be " + "installed in a directory that is named in your %PATH% environment " + "variable. You may install this DLL by downloading Visual C++ 2015 " + "Redistributable Update 3 from this URL: " + "https://www.microsoft.com/en-us/download/details.aspx?id=53587") + # TODO(mrry): Add specific checks for GPU DLLs if build_info indicates + # that this is a GPU build. + else: + # TODO(mrry): Consider adding checks for the Linux and Mac OS X builds. + pass |