fix: str representation of enum across python versions (#60)

* fix: enforce consistent output across linux, macos and windows

Signed-off-by: Peter Staar <[email protected]>

* reformat docling-core

Signed-off-by: Peter Staar <[email protected]>

* added __str__ to enum class and removed the .name from function

Signed-off-by: Peter Staar <[email protected]>

---------

Signed-off-by: Peter Staar <[email protected]>

Author: PeterStaar-IBM

docling_core/types/doc/labels.py

@@ -29,6 +29,10 @@ class DocItemLabel(str, Enum):
     PARAGRAPH = "paragraph"  # explicitly a paragraph and not arbitrary text
     REFERENCE = "reference"
 
+    def __str__(self):
+        """Get string value."""
+        return str(self.value)
+
 
 class GroupLabel(str, Enum):
     """GroupLabel."""
@@ -43,6 +47,10 @@ class GroupLabel(str, Enum):
     SHEET = "sheet"
     SLIDE = "slide"
 
+    def __str__(self):
+        """Get string value."""
+        return str(self.value)
+
 
 class TableCellLabel(str, Enum):
     """TableCellLabel."""
@@ -51,3 +59,7 @@ class TableCellLabel(str, Enum):
     ROW_HEADER = "row_header"
     ROW_SECTION = "row_section"
     BODY = "body"
+
+    def __str__(self):
+        """Get string value."""
+        return str(self.value)