From d105145760718673f1afeddebf72face87dfb1cf Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Mon, 10 Nov 2025 13:30:49 +0000
Subject: [PATCH 1/3] Initial plan


From 9fe206ac8e86b90a764993a09105fbf37d6bcbd5 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Mon, 10 Nov 2025 13:43:43 +0000
Subject: [PATCH 2/3] Change default for override parameter on VG.color_nodes
 from False to True

Co-authored-by: FlorentinD <15693197+FlorentinD@users.noreply.github.com>
---
 .../src/neo4j_viz/visualization_graph.py      |  2 +-
 python-wrapper/tests/test_colors.py           | 36 +++++++++++++++++++
 2 files changed, 37 insertions(+), 1 deletion(-)

diff --git a/python-wrapper/src/neo4j_viz/visualization_graph.py b/python-wrapper/src/neo4j_viz/visualization_graph.py
index ecc40ab..49efcdf 100644
--- a/python-wrapper/src/neo4j_viz/visualization_graph.py
+++ b/python-wrapper/src/neo4j_viz/visualization_graph.py
@@ -294,7 +294,7 @@ def color_nodes(
         property: Optional[str] = None,
         colors: Optional[ColorsType] = None,
         color_space: ColorSpace = ColorSpace.DISCRETE,
-        override: bool = False,
+        override: bool = True,
     ) -> None:
         """
         Color the nodes in the graph based on either a node field, or a node property.
diff --git a/python-wrapper/tests/test_colors.py b/python-wrapper/tests/test_colors.py
index adc1395..dff4d2c 100644
--- a/python-wrapper/tests/test_colors.py
+++ b/python-wrapper/tests/test_colors.py
@@ -254,3 +254,39 @@ def test_color_nodes_unhashable() -> None:
     VG = VisualizationGraph(nodes=nodes, relationships=[])
     with pytest.raises(ValueError, match="Unable to color nodes by unhashable property type '<class 'list'>'"):
         VG.color_nodes(property="list_of_lists", colors=["#000000"])
+
+
+def test_color_nodes_default_override() -> None:
+    """Test that the default value of override is True (colors are overridden by default)."""
+    nodes = [
+        Node(id="4:d09f48a4-5fca-421d-921d-a30a896c604d:0", caption="Person", color="#FF0000"),
+        Node(id="4:d09f48a4-5fca-421d-921d-a30a896c604d:6", caption="Product", color="#FF0000"),
+        Node(id="4:d09f48a4-5fca-421d-921d-a30a896c604d:11", caption="Product", color="#FF0000"),
+    ]
+
+    VG = VisualizationGraph(nodes=nodes, relationships=[])
+
+    # Call without specifying override - should use default (True) and override existing colors
+    VG.color_nodes(field="caption", colors={"Person": "#000000", "Product": "#00FF00"})
+
+    assert VG.nodes[0].color == Color("#000000")
+    assert VG.nodes[1].color == Color("#00ff00")
+    assert VG.nodes[2].color == Color("#00ff00")  # Should be overridden to #00ff00
+
+
+def test_color_nodes_override_false() -> None:
+    """Test that override=False preserves existing colors."""
+    nodes = [
+        Node(id="4:d09f48a4-5fca-421d-921d-a30a896c604d:0", caption="Person", color="#FF0000"),
+        Node(id="4:d09f48a4-5fca-421d-921d-a30a896c604d:6", caption="Product", color="#FF0000"),
+        Node(id="4:d09f48a4-5fca-421d-921d-a30a896c604d:11", caption="Product"),
+    ]
+
+    VG = VisualizationGraph(nodes=nodes, relationships=[])
+
+    # Call with override=False - should preserve existing colors
+    VG.color_nodes(field="caption", colors={"Person": "#000000", "Product": "#00FF00"}, override=False)
+
+    assert VG.nodes[0].color == Color("#ff0000")  # Should keep existing color
+    assert VG.nodes[1].color == Color("#ff0000")  # Should keep existing color
+    assert VG.nodes[2].color == Color("#00ff00")  # Should get new color (no existing color)

From 7628c55eb6be74aa02f163dd47648dd0e2703a49 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Mon, 10 Nov 2025 13:55:21 +0000
Subject: [PATCH 3/3] Add changelog entry for override parameter default change

Co-authored-by: FlorentinD <15693197+FlorentinD@users.noreply.github.com>
---
 changelog.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/changelog.md b/changelog.md
index 5d02439..36f223a 100644
--- a/changelog.md
+++ b/changelog.md
@@ -3,6 +3,7 @@
 ## Breaking changes
 
 * Removed `table` property from nodes and relationships returned from `from_snowflake`, the table is represented by the `caption` field.
+* Changed default value of `override` parameter in `VisualizationGraph.color_nodes()` from `False` to `True`. The method now overrides existing node colors by default. To preserve existing colors, explicitly pass `override=False`.
 
 ## New features