Fixed code to support Python3.9 syntax

batdetect2/api.py

@@ -250,7 +250,7 @@ def process_file(
     model: DetectionModel = MODEL,
     config: Optional[ProcessingConfiguration] = None,
     device: torch.device = DEVICE,
-    file_id: str | None = None
+    file_id: Optional[str] = None
 ) -> du.RunResults:
     """Process audio file with model.
 
@@ -286,7 +286,7 @@ def process_url(
     model: DetectionModel = MODEL,
     config: Optional[ProcessingConfiguration] = None,
     device: torch.device = DEVICE,
-    file_id: str | None = None
+    file_id: Optional[str] = None
 ) -> du.RunResults:
     """Process audio file with model.
 

batdetect2/utils/audio_utils.py

@@ -185,7 +185,7 @@ def load_audio_data(
     target_samp_rate: int,
     scale: bool = False,
     max_duration: Optional[float] = None,
-) -> Tuple[int, np.ndarray, int | float]:
+) -> Tuple[int, np.ndarray, Union[float, int]]:
     """Load an audio file and resample it to the target sampling rate.
 
     The audio is also scaled to [-1, 1] and clipped to the maximum duration.

batdetect2/utils/detector_utils.py

@@ -742,7 +742,7 @@ def process_file(
     model: DetectionModel,
     config: ProcessingConfiguration,
     device: torch.device,
-    file_id: str | None = None
+    file_id: Optional[str] = None
 ) -> Union[RunResults, Any]:
     """Process a single audio file with detection model.