Remove Python 2 support

.travis.yml

@@ -24,8 +24,6 @@ jobs:
     - env: DJANGO=master
 
   include:
-    - python: 2.7
-      env: DJANGO=1.11
 
     - python: 3.5
       env: DJANGO=1.11

graphene_django/debug/sql/tracking.py

@@ -5,7 +5,6 @@ import json
 from threading import local
 from time import time
 
-import six
 from django.utils.encoding import force_str
 
 from .types import DjangoDebugSQL
@@ -77,7 +76,7 @@ class NormalCursorWrapper(object):
         self.logger = logger
 
     def _quote_expr(self, element):
-        if isinstance(element, six.string_types):
+        if isinstance(element, str):
             return "'%s'" % force_str(element).replace("'", "''")
         else:
             return repr(element)

graphene_django/fields.py

@@ -1,6 +1,5 @@
 from functools import partial
 
-import six
 from django.db.models.query import QuerySet
 from graphql_relay.connection.arrayconnection import connection_from_list_slice
 from promise import Promise

graphene_django/filter/utils.py

@@ -1,5 +1,3 @@
-import six
-
 from django_filters.utils import get_model_field
 from .filterset import custom_filterset_factory, setup_filterset
 
@@ -13,7 +11,7 @@ def get_filtering_args_from_filterset(filterset_class, type):
 
     args = {}
     model = filterset_class._meta.model
-    for name, filter_field in six.iteritems(filterset_class.base_filters):
+    for name, filter_field in filterset_class.base_filters.items():
         form_field = None
 
         if name in filterset_class.declared_filters:

graphene_django/settings.py

@@ -13,7 +13,6 @@ back to the defaults.
 """
 from __future__ import unicode_literals
 
-import six
 from django.conf import settings
 from django.test.signals import setting_changed
 
@@ -55,7 +54,7 @@ def perform_import(val, setting_name):
     """
     if val is None:
         return None
-    elif isinstance(val, six.string_types):
+    elif isinstance(val, str):
         return import_from_string(val, setting_name)
     elif isinstance(val, (list, tuple)):
         return [import_from_string(item, setting_name) for item in val]

graphene_django/tests/test_command.py

@@ -1,8 +1,8 @@
 from textwrap import dedent
 
 from django.core import management
+from io import StringIO
 from mock import mock_open, patch
-from six import StringIO
 
 from graphene import ObjectType, Schema, String
 

graphene_django/types.py

@@ -1,7 +1,7 @@
 import warnings
 from collections import OrderedDict
+from typing import Type
 
-import six
 from django.db.models import Model
 from django.utils.functional import SimpleLazyObject
 
@@ -21,9 +21,6 @@ from .utils import (
     is_valid_django_model,
 )
 
-if six.PY3:
-    from typing import Type
-
 
 ALL_FIELDS = "__all__"
 

graphene_django/utils/utils.py

@@ -1,6 +1,5 @@
 import inspect
 
-import six
 from django.db import models
 from django.db.models.manager import Manager
 from django.utils.encoding import force_text
@@ -27,13 +26,13 @@ def isiterable(value):
 def _camelize_django_str(s):
     if isinstance(s, Promise):
         s = force_text(s)
-    return to_camel_case(s) if isinstance(s, six.string_types) else s
+    return to_camel_case(s) if isinstance(s, str) else s
 
 
 def camelize(data):
     if isinstance(data, dict):
         return {_camelize_django_str(k): camelize(v) for k, v in data.items()}
-    if isiterable(data) and not isinstance(data, (six.string_types, Promise)):
+    if isiterable(data) and not isinstance(data, (str, Promise)):
         return [camelize(d) for d in data]
     return data
 

graphene_django/views.py

@@ -2,7 +2,6 @@ import inspect
 import json
 import re
 
-import six
 from django.http import HttpResponse, HttpResponseNotAllowed
 from django.http.response import HttpResponseBadRequest
 from django.shortcuts import render
@@ -314,7 +313,7 @@ class GraphQLView(View):
         variables = request.GET.get("variables") or data.get("variables")
         id = request.GET.get("id") or data.get("id")
 
-        if variables and isinstance(variables, six.text_type):
+        if variables and isinstance(variables, str):
             try:
                 variables = json.loads(variables)
             except Exception:
@@ -331,7 +330,7 @@ class GraphQLView(View):
         if isinstance(error, GraphQLError):
             return format_graphql_error(error)
 
-        return {"message": six.text_type(error)}
+        return {"message": str(error)}
 
     @staticmethod
     def get_content_type(request):

setup.py

@@ -1,5 +1,4 @@
 from setuptools import find_packages, setup
-import sys
 import ast
 import re
 
@@ -19,8 +18,7 @@ tests_require = [
     "coveralls",
     "mock",
     "pytz",
-    "django-filter<2;python_version<'3'",
-    "django-filter>=2;python_version>='3'",
+    "django-filter>=2",
     "pytest-django>=3.3.2",
 ] + rest_framework_require
 
@@ -45,8 +43,6 @@ setup(
         "Development Status :: 3 - Alpha",
         "Intended Audience :: Developers",
         "Topic :: Software Development :: Libraries",
-        "Programming Language :: Python :: 2",
-        "Programming Language :: Python :: 2.7",
         "Programming Language :: Python :: 3",
         "Programming Language :: Python :: 3.4",
         "Programming Language :: Python :: 3.5",
@@ -56,7 +52,6 @@ setup(
     keywords="api graphql protocol rest relay graphene",
     packages=find_packages(exclude=["tests"]),
     install_requires=[
-        "six>=1.10.0",
         "graphene>=2.1.7,<3",
         "graphql-core>=2.1.0,<3",
         "Django>=1.11",

tox.ini

@@ -1,14 +1,12 @@
 [tox]
 envlist =
-    py{27,35,36,37}-django{111,20,21,22,master},
+    py{35,36,37}-django{111,master},
     py{36,37}-django30,
     black,flake8
 
 [travis:env]
 DJANGO =
     1.11: django111
-    2.0: django20
-    2.1: django21
     2.2: django22
     3.0: django30
     master: djangomaster
@@ -22,8 +20,6 @@ deps =
     -e.[test]
     psycopg2
     django111: Django>=1.11,<2.0
-    django20: Django>=2.0,<2.1
-    django21: Django>=2.1,<2.2
     django22: Django>=2.2,<3.0
     django30: Django>=3.0a1,<3.1
     djangomaster: https://github.com/django/django/archive/master.zip