Replace IOError -> OSError

src/ctapipe/instrument/camera/geometry.py

@@ -672,7 +672,7 @@ def from_table(cls, url_or_table, **kwargs):
 
         version = tab.meta.get("TAB_VER")
         if version not in cls.SUPPORTED_TAB_VERSIONS:
-            raise IOError(f"Unsupported camera geometry table version: {version}")
+            raise OSError(f"Unsupported camera geometry table version: {version}")
 
         return cls(
             name=tab.meta.get("CAM_ID", "Unknown"),

src/ctapipe/instrument/camera/readout.py

@@ -209,7 +209,7 @@ def from_table(cls, url_or_table, **kwargs):
 
         version = tab.meta.get("TAB_VER", "")
         if version not in cls.SUPPORTED_TAB_VERSIONS:
-            raise IOError(
+            raise OSError(
                 f"CameraReadout table has unsupported version: {version},"
                 f" supported are: {cls.SUPPORTED_TAB_VERSIONS}."
             )

src/ctapipe/io/hdf5merger.py

@@ -76,7 +76,7 @@ def _get_required_nodes(h5file):
     return required_nodes
 
 
-class CannotMerge(IOError):
+class CannotMerge(OSError):
     """Raised when trying to merge incompatible files"""
 
 

src/ctapipe/io/tests/test_eventseeker.py

@@ -80,7 +80,7 @@ def test_eventseeker_simtel():
         assert event.count == 2
         event = seeker.get_event_index(4)
         assert event.count == 4
-        with pytest.raises(IOError):
+        with pytest.raises(OSError):
             seeker.get_event_index(1)
         event = seeker.get_event_index(5)
         assert event.count == 5

src/ctapipe/io/tests/test_hdf5.py

@@ -459,7 +459,7 @@ def test_closing_writer(tmp_path):
 
 
 def test_cannot_read_with_writer(tmp_path):
-    with pytest.raises(IOError):
+    with pytest.raises(OSError):
         with HDF5TableWriter(tmp_path / "test.h5", "test", mode="r"):
             pass
 
@@ -984,7 +984,7 @@ class Container1(Container):
 
     # This needs to fail since the mapping is not unique
     with HDF5TableReader(path) as reader:
-        with pytest.raises(IOError):
+        with pytest.raises(OSError):
             generator = reader.read("/values", [Container1, Container1])
             next(generator)
 

src/ctapipe/io/tests/test_write_table.py

@@ -46,7 +46,7 @@ def test_write_table(tmp_path):
     assert read["speed"].description == "Speed of stuff"
 
     # test error for already existing table
-    with pytest.raises(IOError):
+    with pytest.raises(OSError):
         write_table(table, output_path, table_path)
 
     # test we can append