Convert to Python 3

[baagaard-usgs]

Need to convert to Python 3 before end of life for Python v2.

[baagaard-usgs]

@willic3 You can remove more futurize boilerplate.

Remove these statements

from builtins import object
from __future__ import print_function
from builtins import range

Also remove old_div with Python 2.7/3 compatible code (original should be ok).

Stuff that needs more investigation

Can we eliminate these?

from builtins import str
from past.builtins import basestring
from past.builtins import execfile

Potential problems (need to test):

journal/colors/ColorANSI.py might have a problem with str(scheme_list).replace(...).

Ideally, we would like code that is compatible with Python 2.7/3 without any workarounds. In cases where this is not possible, we want to add as few dependencies as possible (i.e., we might have to depend on the future module, but hopefully that is it).

[baagaard-usgs]

Using futurize to update to Python 2/3 compatibility.

Stuff that is not Python 3 compatible:

• ConfigParser

./pyre/inventory/cfg/Parser.py`
from ConfigParser import SafeConfigParser

• urllib

opal/applications/CGIParser.py
pyre/inventory/pml/parser/Facility.py
pyre/inventory/pml/parser/Property.py

• metaclass

Possible "fixes" to identify incompatibilities:

• libfuturize.fixes.fix_future_builtins
• libfuturize.fixes.fix_metaclass

[baagaard-usgs]

• Created nemesis branch baagaard/update-python-3 for updates to Python C API used by nemesis. This branch only works for Python 3.5 and later.

• Updated mpi/_mpi.c via cython for Python 2/3 compatibility.

[baagaard-usgs]

Check to see if we can allow configparser to have strict=False. If strict=True, then each .cfg file cannot have duplicate section headings.