[work in progress] Dropping Python 2 support

.travis.yml

@@ -1,6 +1,5 @@
 language: python
 env:
-    - PYTHON=2.7
     - PYTHON=3.5
     - PYTHON=3.6
     - PYTHON=3.7

pyglmnet/base.py

@@ -1,8 +1,6 @@
 import warnings
 from distutils.version import LooseVersion
 
-from .externals.six import iteritems
-
 ##############################################################################
 # adapted from scikit-learn
 
@@ -61,10 +59,8 @@ class BaseEstimator(object):
     @classmethod
     def _get_param_names(cls):
         """Get parameter names for the estimator"""
-        try:
-            from inspect import signature
-        except ImportError:
-            from .externals.funcsigs import signature
+        from inspect import signature
+
         # fetch the constructor or the original constructor before
         # deprecation wrapping if any
         init = getattr(cls.__init__, 'deprecated_original', cls.__init__)
@@ -138,7 +134,7 @@ def set_params(self, **params):
             # Simple optimisation to gain speed (inspect is slow)
             return self
         valid_params = self.get_params(deep=True)
-        for key, value in iteritems(params):
+        for key, value in params.items():
             split = key.split('__', 1)
             if len(split) > 1:
                 # nested objects case

pyglmnet/datasets.py

@@ -5,11 +5,11 @@
 import sys
 import shutil
 import tempfile
+import urllib
 import itertools
 import numpy as np
 from scipy.misc import comb
 
-from .externals.six.moves import urllib
 
 pbar = None
 

pyglmnet/externals/__init__.py

@@ -1,2 +1 @@
-from . import six
 from . import funcsigs