FIX: Type stubs for databento_dbn

CHANGELOG.md

@@ -1,5 +1,10 @@
 # Changelog
 
+## 0.15.1 - TBD
+
+### Bug fixes
+- Fixed an import error in the Python type stub file
+
 ## 0.15.0 - 2024-01-16
 ### Enhancements
 - Improved `Debug` implementation for all record types

python/databento_dbn.pyi

@@ -5,9 +5,7 @@ import datetime as dt
 from collections.abc import Iterable
 from collections.abc import Sequence
 from enum import Enum
-from typing import BinaryIO, ClassVar, SupportsBytes, TextIO, TypedDict, Union
-
-from . import SymbolMapping
+from typing import BinaryIO, ClassVar, Protocol, SupportsBytes, TextIO, TypedDict, Union
 
 
 FIXED_PRICE_SCALE: int
@@ -35,6 +33,33 @@ _DBNRecord = Union[
     StatMsg,
 ]
 
+class MappingInterval(Protocol):
+    """
+    Represents a symbol mapping over a start and end date range interval.
+
+    Parameters
+    ----------
+    start_date : dt.date
+        The start of the mapping period.
+    end_date : dt.date
+        The end of the mapping period.
+    symbol : str
+        The symbol value.
+
+    """
+
+    start_date: dt.date
+    end_date: dt.date
+    symbol: str
+
+class SymbolMapping(Protocol):
+    """
+    Represents the mappings for one native symbol.
+    """
+
+    raw_symbol: str
+    intervals: Sequence[MappingInterval]
+
 class Compression(Enum):
     """
     Data compression format.