(myvenv)root@graphene-121:~# pip install --upgrade tensorflow
Downloading/unpacking tensorflow
Cannot fetch index base URL Simple index
Could not find any downloads that satisfy the requirement tensorflow
Cleaning up...
No distributions at all found for tensorflow
Storing debug log for failure in /root/.pip/pip.log
(myvenv)root@graphene-121:~# pip -V
pip 1.5.4 from /root/myvenv/local/lib/python2.7/site-packages (python 2.7)
(myvenv)root@graphene-121:~# python -V
Python 2.7.6
(myvenv)root@graphene-121:~#
root@graphene-99:~# vim hi.py
root@graphene-99:~# python hi.py
Traceback (most recent call last):
File "hi.py", line 1, in <module>
import tensorflow as tf
ImportError: No module named tensorflow
(venv)root@graphene-99:~/tensorflow# pip install -U pip
Cannot fetch index base URL Simple index
Could not find any downloads that satisfy the requirement pip in
./venv/lib/python2.7/site-packages
Downloading/unpacking pip
Cleaning up...
No distributions at all found for pip in ./venv/lib/python2.7/site-packages
Storing debug log for failure in /root/.pip/pip.log
(venv)root@graphene-99:~/tensorflow# pip -V
pip 1.5.4 from /root/tensorflow/venv/local/lib/python2.7/site-packages
(python 2.7)
(venv)root@graphene-99:~/tensorflow# pip install -U tensorflow
Downloading/unpacking tensorflow
Cannot fetch index base URL Simple index
Could not find any downloads that satisfy the requirement tensorflow
Cleaning up...
No distributions at all found for tensorflow
Storing debug log for failure in /root/.pip/pip.log
Looks pretty clear that you should do a complete clean install; and if the install instructions you are using produce the same results; then find some better install instructions.