import theano gets Illegal instruction

Question

after install the bleeding-edge version and even uninstall Theano, I'm still getting "Illegal instruction" from "import theano", i'm on ubuntu 12.04 precise

zhge@phx-r-ins1-7773:~$ sudo pip uninstall Theano
Uninstalling Theano:
Proceed (y/n)? y
  Successfully uninstalled Theano
zhge@phx-r-ins1-7773:~$ python
Python 2.7.3 (default, Sep 26 2013, 20:03:06)
[GCC 4.6.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import theano
Illegal instruction
zhge@phx-r-ins1-7773:~$

Answer 1

This can happen when you move from one computer to another with the same .local directory. The following (from here) worked for me:

First delete ~/.theano which stores some theano compiled files. Then reinstall theano via pip uninstall theano; pip install --user theano. It also fixes the gensim install for some reason (which shows the same error upon importing). Perhaps gensim imports theano when it can?