fixes underspecified typing_extensions dependency

Author: Kircheneer

diffsync/__init__.py

@@ -14,9 +14,9 @@
 See the License for the specific language governing permissions and
 limitations under the License.
 """
+import sys
 from inspect import isclass
 from typing import Callable, ClassVar, Dict, List, Optional, Tuple, Type, Union, Any, Set
-from typing_extensions import Self
 
 from pydantic import BaseModel, PrivateAttr
 import structlog  # type: ignore
@@ -29,6 +29,11 @@
 from diffsync.store.local import LocalStore
 from diffsync.utils import get_path, set_key, tree_string
 
+if sys.version_info >= (3, 11):
+    from typing import Self
+else:
+    from typing_extensions import Self
+
 # This workaround is used because we are defining a method called `str` in our class definition, which therefore renders
 # the builtin `str` type unusable.
 StrType = str

poetry.lock

@@ -22,6 +22,8 @@ structlog = ">= 20.1.0, < 23.0.0"
 packaging = ">= 21.3, < 24.0"
 colorama = {version = "^0.4.3", optional = true}
 redis = {version = "^4.3", optional = true}
+# typing.Self introduced in 3.11
+typing-extensions = { version = ">=4.0.1", python = "<3.11" }
 
 [tool.poetry.extras]
 redis = ["redis"]

pyproject.toml

@@ -47,7 +47,7 @@ def is_truthy(arg):
 
 
 # Can be set to a separate Python version to be used for launching or building image
-PYTHON_VER = os.getenv("PYTHON_VER", os.getenv("TRAVIS_PYTHON_VERSION", "3.8"))
+PYTHON_VER = os.getenv("PYTHON_VER", "3.8")
 # Name of the docker image/image
 NAME = os.getenv("IMAGE_NAME", f"diffsync-py{PYTHON_VER}")
 # Tag for the image