Fix typing errors in older python builds

Author: cahna

anymail/backends/mailtrap.py

@@ -1,5 +1,10 @@
+import sys
 import warnings
-from typing import Any, Literal, NotRequired, TypedDict
+
+if sys.version_info < (3, 11):
+    from typing_extensions import Any, Literal, NotRequired, TypedDict
+else:
+    from typing import Any, Literal, NotRequired, TypedDict
 
 from ..exceptions import AnymailRequestsAPIError, AnymailWarning
 from ..message import AnymailMessage, AnymailRecipientStatus

anymail/webhooks/mailtrap.py

@@ -1,6 +1,11 @@
 import json
+import sys
 from datetime import datetime, timezone
-from typing import Literal, NotRequired, TypedDict
+
+if sys.version_info < (3, 11):
+    from typing_extensions import Literal, NotRequired, TypedDict, Union
+else:
+    from typing import Literal, NotRequired, TypedDict, Union
 
 from ..signals import AnymailTrackingEvent, EventType, RejectReason, tracking
 from .base import AnymailBaseWebhookView
@@ -24,7 +29,7 @@ class MailtrapEvent(TypedDict):
     timestamp: int
     event_id: str
     category: NotRequired[str]
-    custom_variables: NotRequired[dict[str, str | int | float | bool]]
+    custom_variables: NotRequired[dict[str, Union[str, int, float, bool]]]
     reason: NotRequired[str]
     response: NotRequired[str]
     response_code: NotRequired[int]

pyproject.toml

@@ -63,6 +63,7 @@ dependencies = [
     "django>=4.0",
     "requests>=2.4.3",
     "urllib3>=1.25.0",  # requests dependency: fixes RFC 7578 header encoding
+    "typing_extensions>=4.12",  # for older Python compatibility
 ]
 
 [project.optional-dependencies]
@@ -74,6 +75,7 @@ brevo = []
 mailersend = []
 mailgun = []
 mailjet = []
+mailtrap = []
 mandrill = []
 postmark = []
 resend = ["svix"]