Merge pull request #88 from NatLibFi/drop-python-2

Drop Python 2 compatibility, add Python 3.9 support

Author: osma

Diff for: .travis.yml

@@ -1,10 +1,10 @@
 dist: xenial
 language: python
 python:
-- '2.7'
 - '3.6'
 - '3.7'
 - '3.8'
+- '3.9'
 
 install:
 - python setup.py install

Diff for: README.rst

@@ -18,7 +18,7 @@ the SKOS specification and related best practices.
 Installation
 ============
 
-Skosify requires Python 2.7 or 3.6+.
+Skosify requires Python 3.6+.
 
 .. code-block:: console
 

Diff for: setup.py

@@ -19,18 +19,18 @@
       long_description=README,
       classifiers=[
           'Programming Language :: Python',
-          'Programming Language :: Python :: 2.7',
           'Programming Language :: Python :: 3.6',
           'Programming Language :: Python :: 3.7',
           'Programming Language :: Python :: 3.8',
+          'Programming Language :: Python :: 3.9',
       ],
       keywords='rdf skos',
       author='Osma Suominen',
       author_email='osma.suominen@helsinki.fi',
       url='https://github.com/NatLibFi/Skosify',
       license='MIT',
       install_requires=['rdflib'],
-      setup_requires=['rdflib>=3.0.0', 'pytest-runner>=2.9'],
+      setup_requires=['rdflib>=3.0.0,<6.0.0', 'pytest-runner>=2.9'],
       tests_require=['pytest<6.0.0', 'pytest-pep8', 'pytest-cov', 'pytest-catchlog'],
       packages=['skosify', 'skosify.rdftools'],
       entry_points={'console_scripts': ['skosify=skosify.cli:main']}

Diff for: skosify/config.py

@@ -9,11 +9,7 @@
 from copy import copy
 from rdflib.namespace import URIRef, Namespace, RDF, RDFS, OWL, SKOS, DC, DCTERMS, XSD
 
-# import for both Python 2 and Python 3
-try:
-    from configparser import ConfigParser
-except ImportError:
-    from ConfigParser import SafeConfigParser as ConfigParser
+from configparser import ConfigParser
 
 # default namespaces to register in the graph
 DEFAULT_NAMESPACES = {
@@ -105,11 +101,7 @@ def read_file(self, cfgparser, file):
 
         if hasattr(file, 'readline'):
             # we have a file object
-            if sys.version_info >= (3, 2):
-                cfgparser.read_file(file)  # Added in Python 3.2
-            else:
-                cfgparser.readfp(file)  # Deprecated since Python 3.2
-
+            cfgparser.read_file(file)
         else:
             # we have a file name
             cfgparser.read(file)
@@ -153,9 +145,6 @@ def expand_curielike(namespaces, curie):
 
     if curie == '':
         return None
-    if sys.version < '3' and not isinstance(curie, type(u'')):
-        # Python 2 ConfigParser gives raw byte strings
-        curie = curie.decode('UTF-8')  # ...make those into Unicode objects
 
     if curie.startswith('[') and curie.endswith(']'):
         # decode SafeCURIE