From b58899ce8dbdc543e28c647b2f0ac1b725a42ac7 Mon Sep 17 00:00:00 2001
From: Dimitri Papadopoulos
 <3234522+DimitriPapadopoulos@users.noreply.github.com>
Date: Wed, 11 Oct 2023 22:19:33 +0200
Subject: [PATCH] Revert 2 out of 3 list comprehension changes

The order of the returned list should not be modified.
---
 src/highdicom/seg/sop.py | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/src/highdicom/seg/sop.py b/src/highdicom/seg/sop.py
index ef55022e..33b5b149 100644
--- a/src/highdicom/seg/sop.py
+++ b/src/highdicom/seg/sop.py
@@ -2595,9 +2595,12 @@ def segmented_property_categories(self) -> List[CodedConcept]:
             descriptions in this SEG image.
 
         """
-        return list(
-            {desc.segmented_property_category for desc in self.SegmentSequence}
-        )
+        categories = []
+        for desc in self.SegmentSequence:
+            if desc.segmented_property_category not in categories:
+                categories.append(desc.segmented_property_category)
+
+        return categories
 
     @property
     def segmented_property_types(self) -> List[CodedConcept]:
@@ -2610,9 +2613,12 @@ def segmented_property_types(self) -> List[CodedConcept]:
             descriptions in this SEG image.
 
         """
-        return list(
-            {desc.segmented_property_type for desc in self.SegmentSequence}
-        )
+        types = []
+        for desc in self.SegmentSequence:
+            if desc.segmented_property_type not in types:
+                types.append(desc.segmented_property_type)
+
+        return types
 
     def _get_pixels_by_seg_frame(
         self,