FIX: Add back Python is_heartbeat()

Author: threecgreen

CHANGELOG.md

@@ -1,6 +1,6 @@
 # Changelog
 
-## 0.39.0 - TBD
+## 0.39.0 - 2025-07-29
 
 ### Enhancements
 - Added `side()` and `unpaired_side()` methods to `ImbalanceMsg` that convert the fields

python/python/databento_dbn/_lib.pyi

@@ -4945,6 +4945,17 @@ class SystemMsg(Record):
         msg,
         code,
     ) -> None: ...
+    def is_heartbeat(self) -> bool:
+        """
+        Return `true` if this message is a heartbeat, used to indicate the connection
+        with the gateway is still open.
+
+        Returns
+        -------
+        bool
+
+        """
+
     @property
     def msg(self) -> str:
         """
@@ -6284,6 +6295,17 @@ class SystemMsgV1(Record):
         ts_event,
         msg,
     ) -> None: ...
+    def is_heartbeat(self) -> bool:
+        """
+        Return `true` if this message is a heartbeat, used to indicate the connection
+        with the gateway is still open.
+
+        Returns
+        -------
+        bool
+
+        """
+
     @property
     def msg(self) -> str:
         """

rust/dbn/src/python/record.rs

@@ -2646,6 +2646,11 @@ impl SystemMsg {
         Ok(mem::size_of::<Self>())
     }
 
+    #[pyo3(name = "is_heartbeat")]
+    fn py_is_heartbeat(&self) -> bool {
+        self.is_heartbeat()
+    }
+
     #[getter]
     fn get_msg(&self) -> PyResult<&str> {
         Ok(self.msg()?)
@@ -3553,6 +3558,11 @@ impl v1::SystemMsg {
         Ok(mem::size_of::<Self>())
     }
 
+    #[pyo3(name = "is_heartbeat")]
+    fn py_is_heartbeat(&self) -> bool {
+        self.is_heartbeat()
+    }
+
     #[getter]
     fn get_msg(&self) -> PyResult<&str> {
         Ok(self.msg()?)