Do you have keras.py or keras.pyc in the current working directory? If so, this will mess up the imports. Try renaming the file and/or deleting keras.pyc.

Indeed the problem was that I had multiple versions of Python.

Removing Anaconda Python and installing all libraries using pip / apt-get instead of conda solved my problem.

I found this to be true but it is not necessary to delete anaconda. I had the same issue but with multiple python versions. However, i created an environment that only used the Anaconda version (while in that environment). In terminal (on mac and other suitable terminals), type/copy

conda create -n dataweekends python=2.7 pandas scikit-learn jupyter matplotlib

dataweekends is simply the name of the environment you created. To access this, just use the command

source activate dataweekends

Be mindful that you might (probably) have to reinstall dependencies once in that new environment.

I got this trick from here "https://www.dataweekends.com/blog/2017/03/09/set-up-your-mac-for-deep-learning-with-python-keras-and-tensorflow"

I would also recommend setting up different environments for each project you do in python.

Thanks to the comment from Selcuk which got me on the right track.

Indeed the problem was that I had multiple versions of Python. I followed some online instructions to installing Keras which recommended installing MiniConda/Conda/Anaconda which is its own version of python. So I had two Python2.7 versions installed:

• Normal Linux Python 2.7
• Anaconda Python 2.7

Removing Anaconda Python and installing all libraries using pip / apt-get instead of conda solved my problem.