1. Removed six dependency

2. pytz and typing are installed for old python versions only
3. psycopg2-bynary is installed in test environment instead of psycopg2

docs/basic_information.md

@@ -16,9 +16,8 @@ It is based on [infi.clickhouse-orm](https://github.com/Infinidat/infi.clickhous
 * [Django](https://docs.djangoproject.com/) 1.7+
 * [Yandex ClickHouse](https://clickhouse.yandex/)
 * [infi.clickhouse-orm](https://github.com/Infinidat/infi.clickhouse_orm)
-* [pytz](https://pypi.org/project/pytz/)
-* [six](https://pypi.org/project/six/)
-* [typing](https://pypi.org/project/typing/)
+* [pytz](https://pypi.org/project/pytz/) for python before 3.3
+* [typing](https://pypi.org/project/typing/) for python before 3.5
 * [psycopg2](https://www.psycopg.org/)
 * [celery](http://www.celeryproject.org/)
 * [statsd](https://pypi.org/project/statsd/)

requirements-test.txt

@@ -1,11 +1,11 @@
+celery
 Django (>=1.7)
-pytz
-six
-typing
-psycopg2
 infi.clickhouse-orm
-celery
+pytz; python_version < '3.3'
 statsd
+typing; python_version < '3.5'
+
+psycopg2-binary
 django-pg-returning
 django-pg-bulk-update
-redis
+redis

requirements.txt

@@ -1,7 +1,6 @@
+celery
 Django (>=1.7)
-pytz
-six
-typing; python_version < "3.5"
 infi.clickhouse-orm
-celery
+pytz; python_version < '3.3'
 statsd
+typing; python_version < '3.5'

setup.py

@@ -13,7 +13,7 @@
 
 setup(
     name='django-clickhouse',
-    version='1.0.3',
+    version='1.0.4',
     packages=['django_clickhouse'],
     package_dir={'': 'src'},
     url='https://github.com/carrotquest/django-clickhouse',

src/django_clickhouse/clickhouse_models.py

@@ -11,7 +11,6 @@
 from django.db.models import Model as DjangoModel, QuerySet as DjangoQuerySet
 from infi.clickhouse_orm.engines import CollapsingMergeTree
 from infi.clickhouse_orm.models import Model as InfiModel, ModelBase as InfiModelBase
-from six import with_metaclass
 from statsd.defaults.django import statsd
 
 from .compatibility import namedtuple
@@ -41,7 +40,7 @@ def __new__(cls, *args, **kwargs):
         return res
 
 
-class ClickHouseModel(with_metaclass(ClickHouseModelMeta, InfiModel)):
+class ClickHouseModel(InfiModel, metaclass=ClickHouseModelMeta):
     """
     Base model for all other models
     """

src/django_clickhouse/database.py

@@ -3,7 +3,6 @@
 
 from infi.clickhouse_orm.database import Database as InfiDatabase, DatabaseException
 from infi.clickhouse_orm.utils import parse_tsv
-from six import next
 from io import BytesIO
 from statsd.defaults.django import statsd
 

src/django_clickhouse/models.py

@@ -5,7 +5,6 @@
 
 from typing import Optional, Any, Type, Set
 
-import six
 from django.db import transaction
 from django.db.models import QuerySet as DjangoQuerySet, Model as DjangoModel, Manager as DjangoManager
 from django.db.models.manager import BaseManager
@@ -64,7 +63,7 @@ def _update_returning_param(self, returning):
         pk_name = self.model._meta.pk.name
         if returning is None:
             returning = pk_name
-        elif isinstance(returning, six.string_types):
+        elif isinstance(returning, str):
             returning = [pk_name, returning]
         else:
             returning = list(returning) + [pk_name]

src/django_clickhouse/routers.py

@@ -4,7 +4,6 @@
 from typing import Type
 
 import random
-import six
 from infi.clickhouse_orm.migrations import Operation, DropTable, CreateTable
 
 from .clickhouse_models import ClickHouseModel
@@ -47,7 +46,7 @@ def allow_migrate(self, db_alias: str, app_label: str, operation: Operation,
 
         if hints.get('model'):
             model = '%s.%s.%s' % (app_label, config.MODELS_MODULE, hints['model']) \
-                if isinstance(hints['model'], six.string_types) else hints['model']
+                if isinstance(hints['model'], str) else hints['model']
 
         model = lazy_class_import(model)
 

src/django_clickhouse/storages.py

@@ -11,7 +11,6 @@
 from typing import Any, Optional, List, Tuple
 
 import os
-from six import with_metaclass
 from statsd.defaults.django import statsd
 
 from .configuration import config
@@ -152,7 +151,7 @@ def set_last_sync_time(self, import_key: str, dt: datetime.datetime) -> None:
         raise NotImplemented()
 
 
-class RedisStorage(with_metaclass(SingletonMeta, Storage)):
+class RedisStorage(Storage, metaclass=SingletonMeta):
     """
     Fast in-memory storage made on bases of redis and redis-py library.
     Requires:

src/django_clickhouse/utils.py

@@ -7,7 +7,6 @@
 from typing import Union, Any, Optional, TypeVar, Set, Dict, Iterable, Tuple, Iterator, Callable, List
 
 import pytz
-import six
 from importlib import import_module
 from importlib.util import find_spec
 from django.db.models import Model as DjangoModel
@@ -76,7 +75,7 @@ def lazy_class_import(obj: Union[str, Any]) -> Any:
     :param obj: A string class path or object to return
     :return: Imported object
     """
-    if isinstance(obj, six.string_types):
+    if isinstance(obj, str):
         module_name, obj_name = obj.rsplit('.', 1)
         module = import_module(module_name)
 

tests/test_utils.py

@@ -3,7 +3,6 @@
 
 import pytz
 from django.test import TestCase
-from six import with_metaclass
 
 from django_clickhouse.models import ClickHouseSyncModel
 from django_clickhouse.utils import get_tz_offset, format_datetime, lazy_class_import, int_ranges, exec_in_parallel, \
@@ -110,7 +109,7 @@ def _test_func(x):
 
 class TestSingletonMeta(TestCase):
     def test_singleton(self):
-        class Single(with_metaclass(SingletonMeta)):
+        class Single(metaclass=SingletonMeta):
             def __init__(self):
                 self.test = 1