I get the same error with python2. Any idea to fix it?

the same issue to me on python3

@benelot @DarryO @chrisolston find a potential bug in bazel-bin/tensorflow_serving/example/mnist_export line 29:
PYTHON_BINARY = '/usr/bin/python' which should be the python version by self-adaptive accordingly.
in my env, PYTHON_BINARY = '/usr/bin/python3' likely

I tried to port this to Python 3 but it does not work :/

Error:
Traceback (most recent call last):
File "/home/teppi/Downloads/serving/bazel-bin/tensorflow_serving/example/mnist_saved_model.runfiles/org_tensorflow/tensorflow/python/pywrap_tensorflow.py", line 58, in
from tensorflow.python.pywrap_tensorflow_internal import *
File "/home/teppi/Downloads/serving/bazel-bin/tensorflow_serving/example/mnist_saved_model.runfiles/org_tensorflow/tensorflow/python/pywrap_tensorflow_internal.py", line 28, in
_pywrap_tensorflow_internal = swig_import_helper()
File "/home/teppi/Downloads/serving/bazel-bin/tensorflow_serving/example/mnist_saved_model.runfiles/org_tensorflow/tensorflow/python/pywrap_tensorflow_internal.py", line 24, in swig_import_helper
_mod = imp.load_module('_pywrap_tensorflow_internal', fp, pathname, description)
File "/home/teppi/anaconda3/lib/python3.6/imp.py", line 242, in load_module
return load_dynamic(name, filename, file)
File "/home/teppi/anaconda3/lib/python3.6/imp.py", line 342, in load_dynamic
return _load(spec)
ImportError: /home/teppi/Downloads/serving/bazel-bin/tensorflow_serving/example/mnist_saved_model.runfiles/org_tensorflow/tensorflow/python/_pywrap_tensorflow_internal.so: undefined symbol: PyClass_Type

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/home/teppi/Downloads/serving/bazel-bin/tensorflow_serving/example/mnist_saved_model.runfiles/tf_serving/tensorflow_serving/example/mnist_saved_model.py", line 33, in
import tensorflow as tf
File "/home/teppi/Downloads/serving/bazel-bin/tensorflow_serving/example/mnist_saved_model.runfiles/org_tensorflow/tensorflow/init.py", line 24, in
from tensorflow.python import *
File "/home/teppi/Downloads/serving/bazel-bin/tensorflow_serving/example/mnist_saved_model.runfiles/org_tensorflow/tensorflow/python/init.py", line 49, in
from tensorflow.python import pywrap_tensorflow
File "/home/teppi/Downloads/serving/bazel-bin/tensorflow_serving/example/mnist_saved_model.runfiles/org_tensorflow/tensorflow/python/pywrap_tensorflow.py", line 72, in
raise ImportError(msg)
ImportError: Traceback (most recent call last):
File "/home/teppi/Downloads/serving/bazel-bin/tensorflow_serving/example/mnist_saved_model.runfiles/org_tensorflow/tensorflow/python/pywrap_tensorflow.py", line 58, in
from tensorflow.python.pywrap_tensorflow_internal import *
File "/home/teppi/Downloads/serving/bazel-bin/tensorflow_serving/example/mnist_saved_model.runfiles/org_tensorflow/tensorflow/python/pywrap_tensorflow_internal.py", line 28, in
_pywrap_tensorflow_internal = swig_import_helper()
File "/home/teppi/Downloads/serving/bazel-bin/tensorflow_serving/example/mnist_saved_model.runfiles/org_tensorflow/tensorflow/python/pywrap_tensorflow_internal.py", line 24, in swig_import_helper
_mod = imp.load_module('_pywrap_tensorflow_internal', fp, pathname, description)
File "/home/teppi/anaconda3/lib/python3.6/imp.py", line 242, in load_module
return load_dynamic(name, filename, file)
File "/home/teppi/anaconda3/lib/python3.6/imp.py", line 342, in load_dynamic
return _load(spec)
ImportError: /home/teppi/Downloads/serving/bazel-bin/tensorflow_serving/example/mnist_saved_model.runfiles/org_tensorflow/tensorflow/python/_pywrap_tensorflow_internal.so: undefined symbol: PyClass_Type

Failed to load the native TensorFlow runtime.

See https://www.tensorflow.org/install/install_sources#common_installation_problems

for some common reasons and solutions. Include the entire stack trace
above this error message when asking for help.

i get same error with python3.6.
when i run bazel test -c opt tensorflow_serving/.. . ,

i find it is import error
via read log /home/master/.cache/bazel/_bazel_master/c1898b8dc84af7e4a9b56eba1fa88a07/execroot/tf_serving/bazel-out/local-opt/bin/tensorflow_serving/model_servers/tensorflow_model_server_test.runfiles/org_tensorflow/tensorflow/python/pywrap_tensorflow.py , then i cat this file and find : from tensorflow.python.pywrap_tensorflow_internal import * ,but when i input this commant in python3 it is no problem , but python2 raise exception

I met the problem when I run "bazel build -c opt tensorflow_serving/...", how can I solve it???

finally I find pyclass_type is a python2 variable so we need to change the default interpreter into python2.7, but my previous default interpreter is python3.6 after I installed anaconda. I used the following lines in prompt to reset my enviroment:
$ export PATH
$ declare -p PATH # verify PATH is exported, denoted by the -x
declare -x PATH="<my usual path, omitted...>"
$ /usr/bin/env python -V # shows my own python buildPython 2.7.6
$ export -n PATH # un-export PATH
$ declare -p PATH
declare -- PATH="<my usual path, omitted...>"
$ /usr/bin/env python -V # shows the system (/usr/bin/python) versionPython 2.6.6

then rebuild the server and client, pyClass_type problem do not exist.