MacにTensorFlowを入れようとしたら、Numpyのエラーが出たのでメモ

自分のMac (Mavericks 10.9.5) を入れようとしたら、Numpyのエラーが出て詰まったのでメモ。

TensorFlowは、公式サイトの以下の手順でインストール

[https://www.tensorflow.org/versions/master/get_started/os_setup.html#pip-installation]

sudo pip install --upgrade https://storage.googleapis.com/tensorflow/mac/tensorflow-0.7.1-cp27-none-any.whl

上記で、問題なくインストールできたものの、以下のエラーが出てimportできず。

$ python
>>> import tensorflow
（中略）
Error: numpy.core.multiarray failed to import

ググッて調べて見ると、System PythonにTensorFlowを入れると、別PATHのNumpyを読んでしまうためにエラーが出るという情報あり。

https://groups.google.com/a/tensorflow.org/forum/#!topic/discuss/O4JQjcyI-9M

In my case (using mac OS) reinstalling numpy version 1.10 with pip was not enough because pip installs in /Library/Python/2.7/site-packages> I had numpy 1.6 simultaneously in a different location /System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python When importing tensorflow this was the location first sought for numpy (you can check that with sys.path). Solution: I had to manually remove numpy from this other location not used by pip with "sudo rm .r numpy". Then just restart python.

ここに書かれていた情報を参考に「/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python」以下を見てみたところ、こちらにも過去に入れたと思われるNumpyのファイルがあったので、とりあえずリネームして動作確認

cd /System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/
sudo mv numpy/ numpy_old
$ python
>>> import tensorflow

こちらで問題なく動いた様子。

---

以下はエラーログをググった際に引っ掛けるようのエラーログ全文。

>>> import tensorflow as tf
RuntimeError: module compiled against API version 9 but this version of numpy is 6
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Library/Python/2.7/site-packages/tensorflow/__init__.py", line 23, in <module>
    from tensorflow.python import *
  File "/Library/Python/2.7/site-packages/tensorflow/python/__init__.py", line 49, in <module>
    from tensorflow import contrib
  File "/Library/Python/2.7/site-packages/tensorflow/contrib/__init__.py", line 23, in <module>
    from tensorflow.contrib import layers
  File "/Library/Python/2.7/site-packages/tensorflow/contrib/layers/__init__.py", line 68, in <module>
    from tensorflow.contrib.layers.python.layers import *
  File "/Library/Python/2.7/site-packages/tensorflow/contrib/layers/python/layers/__init__.py", line 22, in <module>
    from tensorflow.contrib.layers.python.layers.initializers import *
  File "/Library/Python/2.7/site-packages/tensorflow/contrib/layers/python/layers/initializers.py", line 24, in <module>
    from tensorflow.python.ops import random_ops
  File "/Library/Python/2.7/site-packages/tensorflow/python/ops/random_ops.py", line 23, in <module>
    from tensorflow.python.framework import ops
  File "/Library/Python/2.7/site-packages/tensorflow/python/framework/ops.py", line 39, in <module>
    from tensorflow.python.framework import versions
  File "/Library/Python/2.7/site-packages/tensorflow/python/framework/versions.py", line 22, in <module>
    from tensorflow.python import pywrap_tensorflow
  File "/Library/Python/2.7/site-packages/tensorflow/python/pywrap_tensorflow.py", line 28, in <module>
    _pywrap_tensorflow = swig_import_helper()
  File "/Library/Python/2.7/site-packages/tensorflow/python/pywrap_tensorflow.py", line 24, in swig_import_helper
    _mod = imp.load_module('_pywrap_tensorflow', fp, pathname, description)
ImportError: numpy.core.multiarray failed to import