Type fixes, got prematurely excited about 3.10 notation

.mypy.ini

@@ -0,0 +1,4 @@
+[mypy]
+
+[mypy-scipy.fftpack.*]
+ignore_missing_imports = True

python/bifrost/blocks/detect.py

@@ -30,13 +30,13 @@
 from bifrost.DataType import DataType
 
 from copy import deepcopy
-from typing import Optional
+from typing import Optional, Union
 
 from bifrost import telemetry
 telemetry.track_module()
 
 class DetectBlock(TransformBlock):
-    def __init__(self, iring, mode: str, axis: Optional[int|str] = None,
+    def __init__(self, iring, mode: str, axis: Optional[Union[int,str]] = None,
                  *args, **kwargs):
         super(DetectBlock, self).__init__(iring, *args, **kwargs)
         self.specified_axis = axis
@@ -137,7 +137,7 @@ def on_data(self, ispan, ospan):
             bf_map(func, shape=shape, axis_names=inds,
                    data={'a': ispan.data, 'b': ospan.data})
 
-def detect(iring, mode: str, axis: Optional[int|str] = None, *args, **kwargs):
+def detect(iring, mode: str, axis: Optional[Union[int,str]] = None, *args, **kwargs):
     """Apply square-law detection to create polarization products.
     Args:
         iring (Ring or Block): Input data source.

python/bifrost/blocks/quantize.py

@@ -33,18 +33,18 @@
 from copy import deepcopy
 import numpy as np
 
-from typing import Any, Dict
+from typing import Any, Dict, Union, Tuple
 
 from bifrost import telemetry
 telemetry.track_module()
 
 class QuantizeBlock(TransformBlock):
-    def __init__(self, iring: Ring, dtype: str|np.dtype, scale: float=1.,
+    def __init__(self, iring: Ring, dtype: Union[str,np.dtype], scale: float=1.,
                  *args, **kwargs):
         super(QuantizeBlock, self).__init__(iring, *args, **kwargs)
         self.dtype = dtype
         self.scale = scale
-    def define_valid_input_spaces(self) -> tuple[str]:
+    def define_valid_input_spaces(self) -> Tuple[str]:
         """Return set of valid spaces (or 'any') for each input"""
         return ('any',)
     def on_sequence(self, iseq: ReadSequence) -> Dict[str,Any]:
@@ -65,7 +65,7 @@ def on_data(self, ispan: ReadSpan, ospan: WriteSpan) -> None:
         odata = ospan.data
         bf_quantize(idata, odata, self.scale)
 
-def quantize(iring: Ring, dtype: str|np.dtype, scale: float=1., *args, **kwargs) -> QuantizeBlock:
+def quantize(iring: Ring, dtype: Union[str,np.dtype], scale: float=1., *args, **kwargs) -> QuantizeBlock:
     """Apply a requantization of bit depth for the data.
 
     Args:

python/bifrost/blocks/unpack.py

@@ -33,18 +33,18 @@
 from copy import deepcopy
 import numpy as np
 
-from typing import Any, Dict
+from typing import Any, Dict, Union, Tuple
 
 from bifrost import telemetry
 telemetry.track_module()
 
 class UnpackBlock(TransformBlock):
-    def __init__(self, iring: Ring, dtype: str|np.dtype, align_msb: bool=False,
+    def __init__(self, iring: Ring, dtype: Union[str,np.dtype], align_msb: bool=False,
                  *args, **kwargs):
         super(UnpackBlock, self).__init__(iring, *args, **kwargs)
         self.dtype     = dtype
         self.align_msb = align_msb
-    def define_valid_input_spaces(self) -> tuple[str]:
+    def define_valid_input_spaces(self) -> Tuple[str]:
         """Return set of valid spaces (or 'any') for each input"""
         return ('any',)
     def on_sequence(self, iseq: ReadSequence) -> Dict[str,Any]:
@@ -65,7 +65,7 @@ def on_data(self, ispan: ReadSpan, ospan: WriteSpan) -> None:
         odata = ospan.data
         bf_unpack(idata, odata, self.align_msb)
 
-def unpack(iring: Ring, dtype: str|np.dtype, *args, **kwargs) -> UnpackBlock:
+def unpack(iring: Ring, dtype: Union[str,np.dtype], *args, **kwargs) -> UnpackBlock:
     """Unpack data to a larger data type.
 
     Args: