Add python3.8 support

Makefile

@@ -13,7 +13,7 @@ autolint:
 	$(PYTHON) -m ruff check --fix .
 
 test:
-	$(PYTHON) -m pytest \
+	$(PYTHON) -m pytest tests \
 		--cov=aiomarketstack \
 		--cov-report=html \
 		--cov-report=term

aiomarketstack/__init__.py

@@ -21,21 +21,23 @@
 from __future__ import annotations
 
 import warnings
-from datetime import date, datetime
+from datetime import date, datetime, timezone
 from enum import IntEnum
 from typing import (
     TYPE_CHECKING,
     AsyncGenerator,
     Callable,
     Collection,
     Literal,
-    Self,
 )
 
 import aiohttp
 import structlog
 from aiohttp import ClientResponse, ClientSession
 
+if TYPE_CHECKING:
+    from typing_extensions import Self
+
 from aiomarketstack.exceptions import (
     ForbiddenError,
     FunctionAccessRestrictedError,
@@ -306,9 +308,16 @@ def _deserialize_eod(raw_eod: RawEod) -> Eod:
             "dividend": raw_eod["dividend"],
             "symbol": raw_eod["symbol"],
             "exchange": raw_eod["exchange"],
-            "date": datetime.fromisoformat(raw_eod["date"]).date(),
+            "date": _MarketstackClient._parse_marketstack_date(raw_eod["date"]),
         }
 
+    @staticmethod
+    def _parse_marketstack_date(date_str: str) -> date:
+        # Necessary because python < 3.11's fromisoformat didn't support IS8601.
+        marketstack_date_format = "%Y-%m-%dT%H:%M:%S%z"
+        return datetime.strptime(date_str, marketstack_date_format) \
+            .replace(tzinfo=timezone.utc).date()
+
 
 class HttpMarketstackClient(_MarketstackClient):
     """The main marketstack client.

aiomarketstack/exceptions.py

@@ -1,8 +1,8 @@
 """Marketstack Error Response Errors."""
 
-from typing import Self
 
 from aiohttp.client import ClientResponse
+from typing_extensions import Self
 
 
 class ResponseError(Exception):

aiomarketstack/types.py

@@ -2,11 +2,13 @@
 
 from __future__ import annotations
 
-from typing import TYPE_CHECKING, NotRequired, Required, Sequence, TypedDict
+from typing import TYPE_CHECKING, Sequence, TypedDict
 
 if TYPE_CHECKING:
     from datetime import date
 
+    from typing_extensions import NotRequired, Required
+
 
 class Eod(TypedDict):
     """Represents an end-of-day marketstack return type."""

pyproject.toml

@@ -7,17 +7,18 @@ readme = "README.md"
 packages = [{ include = "aiomarketstack" }]
 
 [tool.poetry.dependencies]
-aiohttp = "^3.7.3"
-python = "^3.9"
-structlog = "^23.1.0"
+python = "^3.8"
+aiohttp = {version = "^3.9.1", python = "^3.8"}
+structlog = {version = "^23.2.0", python = "^3.8"}
+typing-extensions = {version = "^4.8.0", python = "^3.8"}
 
 [tool.poetry.group.test.dependencies]
-mypy = "^1.7.1"
-numpy = "^1.26.2"
-pytest = "^7.4.3"
-pytest-asyncio = "^0.23.1"
-pytest-cov = "^4.1.0"
-ruff = "^0.1.6"
+mypy = {version = "^1.7.1", python = "^3.8"}
+pytest = {version = "^7.4.3", python = "^3.8"}
+pytest-asyncio = {version = "^0.23.1", python = "^3.8"}
+pytest-cov = {version = "^4.1.0", python = "^3.8"}
+ruff = {version = "^0.1.6", python = "^3.8"}
+numpy = {version = "^1.24", python = "^3.8"}
 
 [build-system]
 requires = ["poetry-core"]

tests/__init__.py

@@ -1,9 +1,7 @@
 """aiomarketstack's testing package."""
 
-import unittest
-
 from . import test_aiomarketstack
 
-ALL_TESTS = [
-    unittest.defaultTestLoader.loadTestsFromModule(test_aiomarketstack),
+__all__ = [
+    "test_aiomarketstack",
 ]