Tensorflow ImportError on OS X
Question: TL;DR getting `ImportError: cannot import name pywrap_tensorflow ` when trying
to use TensorFlow on El Capitan.

Details: I followed the TensorFlow installation instructions for Mac OS X from
[here](https://www.tensorflow.org/versions/r0.9/get_started/os_setup.html#pip-
installation).

> Mac OS X, CPU only, Python 2.7:
>  
>  
>     $ export
> TF_BINARY_URL=https://storage.googleapis.com/tensorflow/mac/tensorflow-0.9.0rc0-py2-none-
> any.whl
>  
>     $ export
> TF_BINARY_URL=https://storage.googleapis.com/tensorflow/mac/tensorflow-0.9.0rc0-py2-none-
> any.whl
>  
>     $ sudo pip install --upgrade $TF_BINARY_URL
>  

These steps were successful.

So let's try it:

    
    
    22:54:00/tensorflow $ipython
    Python 2.7.11 (default, Jan 22 2016, 08:29:18)
    Type "copyright", "credits" or "license" for more information.
    
    IPython 4.2.0 -- An enhanced Interactive Python.
    ?         -> Introduction and overview of IPython's features.
    %quickref -> Quick reference.
    help      -> Python's own help system.
    object?   -> Details about 'object', use 'object??' for extra details.
    [TerminalIPythonApp] WARNING | File not found: '/shared/.pythonstartup'
    
    In [1]: import tensorflow as tf
    ---------------------------------------------------------------------------
    ImportError                               Traceback (most recent call last)
    <ipython-input-1-41389fad42b5> in <module>()
    ----> 1 import tensorflow as tf
    
    /git/tensorflow/tensorflow/__init__.py in <module>()
         21 from __future__ import print_function
         22
    ---> 23 from tensorflow.python import *
    
    /git/tensorflow/tensorflow/python/__init__.py in <module>()
         46 _default_dlopen_flags = sys.getdlopenflags()
         47 sys.setdlopenflags(_default_dlopen_flags | ctypes.RTLD_GLOBAL)
    ---> 48 from tensorflow.python import pywrap_tensorflow
         49 sys.setdlopenflags(_default_dlopen_flags)
         50
    
    ImportError: cannot import name pywrap_tensorflow
    


Answer: **TL;DR:** Don't run `ipython` (or `python`) from the root of the TensorFlow
git repository when you want to `import tensorflow`.

I answered a similar question
[here](http://stackoverflow.com/a/35963479/3574081). The easiest solution is
to `cd` out of the current directory (e.g. `cd ~`) before running `ipython`.
This will prevent Python from being confused by the `tensorflow` source
subdirectory in the current path. The `./tensorflow` directory in the git
repository doesn't contain all of the generated code (such as
`pywrap_tensorflow`) that is needed to run TensorFlow, but does contain a file
called `__init__.py`, and this confuses the Python interpreter.

