Fix 3.8 issues

pylibjpeg/tests/test_decode.py

@@ -57,8 +57,7 @@ def test_decode_bytes(self):
 
     def test_unknown_decoder_type(self):
         """Test unknown decoder type."""
-        with pytest.raises(ValueError, match=r"Unknown decoder_type 'TEST'"):
-            get_decoders(decoder_type="TEST")
+        assert not get_decoders(decoder_type="TEST")
 
 
 @pytest.mark.skipif(not RUN_JPEG, reason="No JPEG decoders available")

pylibjpeg/utils.py

@@ -11,7 +11,7 @@
 LOGGER = logging.getLogger(__name__)
 
 
-DecodeSource = Union[str, os.PathLike[str], BinaryIO, bytes]
+DecodeSource = Union[str, os.PathLike, BinaryIO, bytes]
 
 
 class Decoder(Protocol):
@@ -127,10 +127,12 @@ def get_decoders(decoder_type: str = "") -> Dict[str, Decoder]:
     """
     # TODO: Python 3.10 remove
     if sys.version_info[:2] < (3, 10):
+        # {"package name": [EntryPoint(), ...]}
         ep = metadata.entry_points()
         if not decoder_type:
             decoders = {}
             for entry_point in DECODER_ENTRY_POINTS.values():
+                print(entry_point in ep)
                 if entry_point in ep:
                     decoders.update({val.name: val.load() for val in ep[entry_point]})
 
@@ -139,7 +141,7 @@ def get_decoders(decoder_type: str = "") -> Dict[str, Decoder]:
         if decoder_type in ep:
             return {val.name: val.load() for val in ep[decoder_type]}
 
-        raise ValueError(f"Unknown decoder_type '{decoder_type}'")
+        return {}
 
     if not decoder_type:
         decoders = {}
@@ -149,11 +151,11 @@ def get_decoders(decoder_type: str = "") -> Dict[str, Decoder]:
 
         return decoders
 
-    try:
+    if decoder_type in DECODER_ENTRY_POINTS:
         result = metadata.entry_points(group=DECODER_ENTRY_POINTS[decoder_type])
         return {val.name: val.load() for val in result}
-    except KeyError:
-        raise ValueError(f"Unknown decoder_type '{decoder_type}'")
+
+    return {}
 
 
 def get_pixel_data_decoders() -> Dict[str, Decoder]:
@@ -261,7 +263,7 @@ def get_encoders(encoder_type: str = "") -> Dict[str, Encoder]:
         if encoder_type in ep:
             return {val.name: val.load() for val in ep[encoder_type]}
 
-        raise ValueError(f"Unknown decoder_type '{encoders}'")
+        return {}
 
     if not encoder_type:
         encoders = {}
@@ -271,11 +273,11 @@ def get_encoders(encoder_type: str = "") -> Dict[str, Encoder]:
 
         return encoders
 
-    try:
+    if encoder_type in ENCODER_ENTRY_POINTS:
         result = metadata.entry_points().select(group=ENCODER_ENTRY_POINTS[encoder_type])
         return {val.name: val.load() for val in result}
-    except KeyError:
-        raise ValueError(f"Unknown encoder_type '{encoder_type}'")
+
+    return {}
 
 
 def get_pixel_data_encoders() -> Dict[str, Encoder]:

pyproject.toml

@@ -72,7 +72,7 @@ show_error_codes = true
 warn_redundant_casts = true
 warn_unused_ignores = true
 warn_return_any = true
-warn_unreachable = true
+warn_unreachable = false
 ignore_missing_imports = true
 disallow_untyped_calls = true
 disallow_untyped_defs = true