Move DuplicateObjectKeyError to errors module

Author: duckontheweb

pystac/__init__.py

@@ -6,6 +6,7 @@
 from pystac.errors import (
     STACError,
     STACTypeError,
+    DuplicateObjectKeyError,
     ExtensionAlreadyExistsError,
     ExtensionNotImplemented,
     ExtensionTypeError,

pystac/errors.py

@@ -19,6 +19,12 @@ class STACTypeError(Exception):
     pass
 
 
+class DuplicateObjectKeyError(Exception):
+    """Raised when deserializing a JSON object containing a duplicate key."""
+
+    pass
+
+
 class ExtensionTypeError(Exception):
     """An ExtensionTypeError is raised when an extension is used against
     an object that the extension does not apply to

pystac/stac_io.py

@@ -293,10 +293,6 @@ def write_text_to_href(
             f.write(txt)
 
 
-class DuplicateObjectKeyError(Exception):
-    pass
-
-
 class DuplicateKeyReportingMixin(StacIO):
     """A mixin for StacIO implementations that will report
     on duplicate keys in the JSON being read in.