fix mypy lint

Author: phaym

devcycle_python_sdk/api/bucketing_client.py

@@ -92,12 +92,17 @@ def request(self, method: str, url: str, **kwargs) -> dict:
     def variable(self, key: str, user: DevCycleUser) -> Variable:
         data = self.request("POST", self._url("variables", key), json=user.to_json())
 
+        eval_data = data.get("eval")
+        eval_reason = None
+        if eval_data is not None and isinstance(eval_data, dict):
+            eval_reason = EvalReason.from_json(eval_data)
+
         return Variable(
             _id=data.get("_id"),
             key=data.get("key", ""),
             type=data.get("type", ""),
             value=data.get("value"),
-            eval=EvalReason.from_json(data.get("eval")) if data.get("eval") else None,
+            eval=eval_reason,
         )
 
     def variables(self, user: DevCycleUser) -> Dict[str, Variable]:

devcycle_python_sdk/models/variable.py

@@ -67,7 +67,7 @@ def from_json(cls, data: dict) -> "Variable":
 
     @staticmethod
     def create_default_variable(
-        key: str, default_value: Any, default_reason_detail: str = None
+        key: str, default_value: Any, default_reason_detail: Optional[str] = None
     ) -> "Variable":
         var_type = determine_variable_type(default_value)
         if default_reason_detail is not None: