fix: remove six dependency

Fixes #164

deepaas/api/v2/debug.py

@@ -15,6 +15,7 @@
 # under the License.
 
 import datetime
+import io
 import logging
 import sys
 import warnings
@@ -23,7 +24,6 @@
 import aiohttp_apispec
 from oslo_config import cfg
 from oslo_log import log
-import six
 
 CONF = cfg.CONF
 
@@ -56,7 +56,7 @@ def setup_debug():
     global DEBUG_STREAM
 
     if CONF.debug_endpoint:
-        DEBUG_STREAM = six.StringIO()
+        DEBUG_STREAM = io.StringIO()
 
         logger = log.getLogger("deepaas").logger
         hdlr = logging.StreamHandler(DEBUG_STREAM)

deepaas/model/v2/base.py

@@ -16,11 +16,8 @@
 
 import abc
 
-import six
 
-
-@six.add_metaclass(abc.ABCMeta)
-class BaseModel(object):
+class BaseModel(object, meta=abc.ABCMeta):
     """Base class for all models to be used with DEEPaaS.
 
     Note that it is not needed for DEEPaaS to inherit from this abstract base

deepaas/tests/test_v2_api.py

@@ -14,10 +14,10 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
+import io
 import uuid
 
 from aiohttp import web
-import six
 from oslo_config import cfg
 from oslo_log import log as logging
 
@@ -69,7 +69,7 @@ async def test_not_found(self):
         self.assertEqual(404, ret.status)
 
     async def test_predict_data(self):
-        f = six.BytesIO(b"foo")
+        f = io.BytesIO(b"foo")
         ret = await self.client.post(
             "/v2/models/deepaas-test/predict/",
             data={"data": (f, "foo.txt"), "parameter": 1},
@@ -187,7 +187,7 @@ def assert_ok(self, response):
         self.assertIn(response.status, [200, 201])
 
     async def test_predict_data(self):
-        f = six.BytesIO(b"foo")
+        f = io.BytesIO(b"foo")
         ret = await self.client.post(
             "/custom/v2/models/deepaas-test/predict/",
             data={"data": (f, "foo.txt"), "parameter": 1},
@@ -276,7 +276,7 @@ async def test_predict_no_parameters(self):
         self.assertEqual(422, ret.status)
 
     async def test_predict_data(self):
-        f = six.BytesIO(b"foo")
+        f = io.BytesIO(b"foo")
         ret = await self.client.post(
             "/v2/models/deepaas-test/predict/",
             data={"data": (f, "foo.txt"), "parameter": 1},

pyproject.toml

@@ -50,7 +50,6 @@ deepaas = "deepaas.opts:list_opts"
 
 [tool.poetry.dependencies]
 python = "^3.10"
-six = "^1.16.0"
 "oslo.log" = "^6.0.0"
 "oslo.config" = "^9.4.0"
 stevedore = "^5.2.0"