Error running basic tensorflow example
Question: I have just reinstalled latest tensorflow on ubuntu:

    
    
    $ sudo pip install --upgrade https://storage.googleapis.com/tensorflow/linux/cpu/tensorflow-0.7.1-cp27-none-linux_x86_64.whl
    [sudo] password for ubuntu: 
    The directory '/home/ubuntu/.cache/pip/http' or its parent directory is not owned by the current user and the cache has been disabled. Please check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
    The directory '/home/ubuntu/.cache/pip' or its parent directory is not owned by the current user and caching wheels has been disabled. check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
    Collecting tensorflow==0.7.1 from https://storage.googleapis.com/tensorflow/linux/cpu/tensorflow-0.7.1-cp27-none-linux_x86_64.whl
      Downloading https://storage.googleapis.com/tensorflow/linux/cpu/tensorflow-0.7.1-cp27-none-linux_x86_64.whl (13.8MB)
        100% |████████████████████████████████| 13.8MB 32kB/s 
    Requirement already up-to-date: six>=1.10.0 in /usr/local/lib/python2.7/dist-packages (from tensorflow==0.7.1)
    Requirement already up-to-date: protobuf==3.0.0b2 in /usr/local/lib/python2.7/dist-packages (from tensorflow==0.7.1)
    Requirement already up-to-date: wheel in /usr/local/lib/python2.7/dist-packages (from tensorflow==0.7.1)
    Requirement already up-to-date: numpy>=1.8.2 in /usr/local/lib/python2.7/dist-packages (from tensorflow==0.7.1)
    Requirement already up-to-date: setuptools in /usr/local/lib/python2.7/dist-packages (from protobuf==3.0.0b2->tensorflow==0.7.1)
    Installing collected packages: tensorflow
      Found existing installation: tensorflow 0.7.1
        Uninstalling tensorflow-0.7.1:
          Successfully uninstalled tensorflow-0.7.1
    Successfully installed tensorflow-0.7.1
    

When following the directions to test it fails with **cannot import name
pywrap_tensorflow** :

    
    
    $ ipython
    
    /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>()
         43 _default_dlopen_flags = sys.getdlopenflags()
         44 sys.setdlopenflags(_default_dlopen_flags | ctypes.RTLD_GLOBAL)
    ---> 45 from tensorflow.python import pywrap_tensorflow
         46 sys.setdlopenflags(_default_dlopen_flags)
         47 
    
    ImportError: cannot import name pywrap_tensorflow
    

Is there an additional change needed to my python or ubuntu/bash environment?


Answer: From the path in your stack trace (`/git/tensorflow/tensorflow/…`), it looks
like your Python path may be loading the tensorflow libraries from the source
directory, rather than the version that you have installed. As a result, it is
unable to find the (compiled) `pywrap_tensorflow` library, which is installed
in a different directory.

A common solution is to `cd` out of the `/git/tensorflow` directory before
starting `python` or `ipython`.

