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The following commit(s) were added to refs/heads/main by this push:
     new 0316204fc2 fix: add quotes around enum string values in visualization 
operators (#4351)
0316204fc2 is described below

commit 0316204fc28db3a8973180c690462683f2f43f56
Author: Xuan Gu <[email protected]>
AuthorDate: Wed Apr 22 22:58:16 2026 -0700

    fix: add quotes around enum string values in visualization operators (#4351)
    
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    This PR adds quotes around plain String values returned by Java enum
    methods in three visualization operators so the generated Python code is
    valid:
    - ContinuousErrorBands: mode='${bandConf.mode.getModeInPlotly}'
    - ContourPlot: contours_coloring='${coloringMethod.getColoringMethod}'
    - Histogram2D: histnorm='${normalize.getValue}'
    
    ### Any related issues, documentation, discussions?
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    Related to #4189
    Resolves #4350
    
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    Existing tests passed
    
    ### Was this PR authored or co-authored using generative AI tooling?
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    No
    
    ---------
    
    Co-authored-by: Yicong Huang 
<[email protected]>
    Co-authored-by: Chen Li <[email protected]>
    Co-authored-by: Xiaozhen Liu <[email protected]>
---
 .../amber/operator/source/apis/reddit/RedditSearchSourceOpDesc.scala    | 2 +-
 .../visualization/continuousErrorBands/ContinuousErrorBandsOpDesc.scala | 2 +-
 .../amber/operator/visualization/contourPlot/ContourPlotOpDesc.scala    | 2 +-
 .../amber/operator/visualization/histogram2d/Histogram2DOpDesc.scala    | 2 +-
 4 files changed, 4 insertions(+), 4 deletions(-)

diff --git 
a/common/workflow-operator/src/main/scala/org/apache/texera/amber/operator/source/apis/reddit/RedditSearchSourceOpDesc.scala
 
b/common/workflow-operator/src/main/scala/org/apache/texera/amber/operator/source/apis/reddit/RedditSearchSourceOpDesc.scala
index 85cf30bf06..078e55b2b2 100644
--- 
a/common/workflow-operator/src/main/scala/org/apache/texera/amber/operator/source/apis/reddit/RedditSearchSourceOpDesc.scala
+++ 
b/common/workflow-operator/src/main/scala/org/apache/texera/amber/operator/source/apis/reddit/RedditSearchSourceOpDesc.scala
@@ -68,7 +68,7 @@ class RedditSearchSourceOpDesc extends 
PythonSourceOperatorDescriptor {
        |    client_secret = $clientSecretReal
        |    limit = $limit
        |    query = $queryReal
-       |    sorting = ${sorting.getName}
+       |    sorting = '${sorting.getName}'
        |
        |    @overrides
        |    def produce(self) -> Iterator[Union[TupleLike, TableLike, None]]:
diff --git 
a/common/workflow-operator/src/main/scala/org/apache/texera/amber/operator/visualization/continuousErrorBands/ContinuousErrorBandsOpDesc.scala
 
b/common/workflow-operator/src/main/scala/org/apache/texera/amber/operator/visualization/continuousErrorBands/ContinuousErrorBandsOpDesc.scala
index 56b25a724f..e121f6fc21 100644
--- 
a/common/workflow-operator/src/main/scala/org/apache/texera/amber/operator/visualization/continuousErrorBands/ContinuousErrorBandsOpDesc.scala
+++ 
b/common/workflow-operator/src/main/scala/org/apache/texera/amber/operator/visualization/continuousErrorBands/ContinuousErrorBandsOpDesc.scala
@@ -106,7 +106,7 @@ class ContinuousErrorBandsOpDesc extends 
PythonOperatorDescriptor {
         fig.add_trace(go.Scatter(
             x=table[${bandConf.xValue}],
             y=table[${bandConf.yValue}],
-            mode=${bandConf.mode.getModeInPlotly},
+            mode='${bandConf.mode.getModeInPlotly}',
             $colorPart
             $namePart
           ))"""
diff --git 
a/common/workflow-operator/src/main/scala/org/apache/texera/amber/operator/visualization/contourPlot/ContourPlotOpDesc.scala
 
b/common/workflow-operator/src/main/scala/org/apache/texera/amber/operator/visualization/contourPlot/ContourPlotOpDesc.scala
index 928ce01c44..fb41ecfedb 100644
--- 
a/common/workflow-operator/src/main/scala/org/apache/texera/amber/operator/visualization/contourPlot/ContourPlotOpDesc.scala
+++ 
b/common/workflow-operator/src/main/scala/org/apache/texera/amber/operator/visualization/contourPlot/ContourPlotOpDesc.scala
@@ -107,7 +107,7 @@ class ContourPlotOpDesc extends PythonOperatorDescriptor {
        |            y=np.linspace(min(y), max(y), grid_size),
        |            z=grid_z,
        |            connectgaps=connGaps,
-       |            contours_coloring =${coloringMethod.getColoringMethod},
+       |            contours_coloring ='${coloringMethod.getColoringMethod}',
        |            colorbar_title=$z
        |        ))
        |        fig.update_layout(title='Contour Plot')
diff --git 
a/common/workflow-operator/src/main/scala/org/apache/texera/amber/operator/visualization/histogram2d/Histogram2DOpDesc.scala
 
b/common/workflow-operator/src/main/scala/org/apache/texera/amber/operator/visualization/histogram2d/Histogram2DOpDesc.scala
index 117ab62d38..34dbc56d59 100644
--- 
a/common/workflow-operator/src/main/scala/org/apache/texera/amber/operator/visualization/histogram2d/Histogram2DOpDesc.scala
+++ 
b/common/workflow-operator/src/main/scala/org/apache/texera/amber/operator/visualization/histogram2d/Histogram2DOpDesc.scala
@@ -78,7 +78,7 @@ class Histogram2DOpDesc extends PythonOperatorDescriptor {
     assert(yBins > 0, s"Y Bins must be > 0, but got $yBins")
 
     val normArg =
-      pyb"histnorm=${normalize.getValue},"
+      pyb"histnorm='${normalize.getValue}',"
 
     pyb"""
        |from pytexera import *

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