Python2.7: ImportError: six 1.3 or later is required; you have 1.2.0

Question

Got this error when importing matplotlib.pyplot. But I have checked the version of six installed using pip list, and it returns version 1.9.0. And when I checked six.__version__, it returns 1.2.0.

Could any one help me?

Answer 1

Check you're using the correct version of pip that refer the correct Python version by issuing following command:

pip -V

The command will show the Python version the pip is using and the path of pip package.

Answer 2

There is probably a bug somewhere, but a quick and dirty work around was the following:

pip install six==1.8.0

Answer 3

I ran into the same thing, the cause was a left over six.pyo / six.pyc in my PYTHONPATH dir which was imported instead of the installed version.