Added new base class for exceptions, added templates

Signed-off-by: chandr-andr (Kiselev Aleksandr) <[email protected]>

Author: chandr-andr

taskiq/exceptions.py

@@ -1,18 +1,20 @@
+from typing import Optional
+
 from izulu import root
 
 
 class TaskiqError(root.Error):
     """Base exception for all errors."""
 
     __template__ = "Exception occurred: {description}"
-    description: str
+    description: Optional[str] = None
 
 
 class TaskiqResultTimeoutError(TaskiqError):
     """Waiting for task results has timed out."""
 
     __template__ = "Waiting for task results has timed out, timeout={timeout}"
-    timeout: float
+    timeout: Optional[float] = None
 
 
 class BrokerError(TaskiqError):
@@ -54,7 +56,8 @@ class ResultIsReadyError(ResultBackendError):
 class SecurityError(TaskiqError):
     """Security related exception."""
 
-    __template__ = "Base exception for all security errors"
+    __template__ = "Security exception occurred: {description}"
+    description: str
 
 
 class NoResultError(TaskiqError):

taskiq/serialization.py

@@ -378,7 +378,10 @@ def exception_to_python(
     if not isinstance(cls, type) or not issubclass(cls, BaseException):
         fake_exc_type = exc_type if exc_module is None else f"{exc_module}.{exc_type}"
         raise taskiq.exceptions.SecurityError(
-            f"Expected an exception class, got {fake_exc_type} with payload {exc_msg}",
+            description=(
+                f"Expected an exception class, "
+                f"got {fake_exc_type} with payload {exc_msg}"
+            ),
         )
 
     # XXX: Without verifying `cls` is actually an exception class,