Cannot raise FileNotFoundError in python2

[duncanmmacleod]

An underlying problem (likely outside matplotlib) is causing a NameError when trying to raise a FileNotFoundError in python2:

...snippet...
  File "/home/duncan.macleod/.local/lib/python2.6/site-packages/matplotlib/dviread.py", line 150, in _read
    self._dispatch(byte)
  File "/home/duncan.macleod/.local/lib/python2.6/site-packages/matplotlib/dviread.py", line 233, in _dispatch
    self._fnt_def(k, c, s, d, a, l, n)
  File "/home/duncan.macleod/.local/lib/python2.6/site-packages/matplotlib/dviread.py", line 390, in _fnt_def
    raise FileNotFoundError("missing font metrics file: %s" % fontname)
NameError: global name 'FileNotFoundError' is not defined

Looks like there needs to be a six.PY3 check to define this exception if required.

[tacaswell]

Thanks for reporting this.

Please be aware that mpl2.0 onward will not support py2.6 and numpy will be dropping 2.6 in numpy 1.12.