未定義的符號：PyUnicodeUCS4_FromStringAndSize與tensorflow在Heroku

Question

試圖在Heroku上安裝tensorflow，到底it fails有：

pywrap_tensorflow.so: undefined symbol: PyUnicodeUCS4_FromStringAndSize 

requirements.txt：

numpy 
https://storage.googleapis.com/tensorflow/linux/cpu/tensorflow-0.5.0-cp27-none-linux_x86_64.whl 

安裝：

git push heroku master 

Counting objects: 5, done. 
Delta compression using up to 2 threads. 
Compressing objects: 100% (3/3), done. 
Writing objects: 100% (3/3), 327 bytes, done. 
Total 3 (delta 1), reused 0 (delta 0) 
remote: Compressing source files... done. 
remote: Building source: 
remote: 
remote: -----> Using set buildpack heroku/python 
remote: -----> Python app detected 
remote: -----> Installing dependencies with pip 
remote:  Collecting numpy (from -r requirements.txt (line 1)) 
remote:   Downloading numpy-1.10.1.tar.gz (4.0MB) 
remote:  Collecting tensorflow==0.5.0 from https://storage.googleapis.com/tensorflow/linux/cpu/tensorflow-0.5.0-cp27-none-linux_x86_64.whl (from -r requirements.txt (line 2)) 
remote:   Downloading https://storage.googleapis.com/tensorflow/linux/cpu/tensorflow-0.5.0-cp27-none-linux_x86_64.whl (10.9MB) 
remote:  Installing collected packages: numpy, tensorflow 
remote:   Running setup.py install for numpy 
remote:  Successfully installed numpy-1.10.1 tensorflow-0.5.0 
remote: 
remote: 
remote: -----> Discovering process types 
remote:  Procfile declares types -> web 
remote: 
remote: -----> Compressing... done, 54.8MB 
remote: -----> Launching... done, v7 
remote:  https://jalapenocandy.herokuapp.com/ deployed to Heroku 
remote: 
remote: Verifying deploy... done. 
To git@heroku.com:jalapenocandy.git 
    9a2cc96..231788d master -> master 

看起來不錯！不幸的是，當我嘗試：

heroku run bash 

$python 
python 
Python 2.7.10 (default, May 27 2015, 20:38:41) 
[GCC 4.8.2] on linux2 
Type "help", "copyright", "credits" or "license" for more information. 
>>> 
>>> import tensorflow as tf 
import tensorflow as tf 
Traceback (most recent call last): 
    File "<stdin>", line 1, in <module> 
    File "/app/.heroku/python/lib/python2.7/site-packages/tensorflow/__init__.py", 
line 4, in <module> 
    from tensorflow.python import * 
    File "/app/.heroku/python/lib/python2.7/site-packages/tensorflow/python/__init 
__.py", line 22, in <module> 
    from tensorflow.python.client.client_lib import * 
    File "/app/.heroku/python/lib/python2.7/site-packages/tensorflow/python/client 
/client_lib.py", line 35, in <module> 
    from tensorflow.python.client.session import InteractiveSession 
    File "/app/.heroku/python/lib/python2.7/site-packages/tensorflow/python/client 
/session.py", line 11, in <module> 
    from tensorflow.python import pywrap_tensorflow as tf_session 
    File "/app/.heroku/python/lib/python2.7/site-packages/tensorflow/python/pywrap 
_tensorflow.py", line 28, in <module> 
    _pywrap_tensorflow = swig_import_helper() 
    File "/app/.heroku/python/lib/python2.7/site-packages/tensorflow/python/pywrap 
_tensorflow.py", line 24, in swig_import_helper 
    _mod = imp.load_module('_pywrap_tensorflow', fp, pathname, description) 
ImportError: /app/.heroku/python/lib/python2.7/site-packages/tensorflow/python/_ 
pywrap_tensorflow.so: undefined symbol: PyUnicodeUCS4_FromStringAndSize 

我能做些什麼嗎？

Answer 1

此問題是由您的Python二進制文件與TensorFlow二進制文件（UCS4）假定的Unicode二進制文件不兼容的Unicode定義（UCS2）引起的。

目前最好的解決方案是構建TensorFlow from source。最新版本在本機擴展中不使用Unicode字符串，因此不應出現此問題。當更新的二進制文件可用時，它們將包含此修復程序。

如果你不能從目標機器上源（例如，使用Heroku的時候），一個選擇是build your own PIP package不同的機器上（具有相同的架構）構建，並添加到您的requirements.txt代替。