Do not show option to change code if code is equal

pkg/migrate/migrator_v1_v1fast.go

@@ -301,6 +301,27 @@ func (g *MigratorV1ToV1Fast) runPythonScript(ctx context.Context, file *zip.File
 		return err
 	}
 	newContent := out.String()
+
+	pythonFilepath := filepath.Join(dir, pythonFilename)
+	pythonFile, err := os.Open(pythonFilepath)
+	if err != nil {
+		return err
+	}
+	content, err := io.ReadAll(pythonFile)
+	pythonFile.Close()
+	if err != nil {
+		return err
+	}
+
+	if newContent == string(content) {
+		if predictorType == PredictorTypePredict {
+			g.logCtx.PythonPredictStatus = coglog.StatusPassed
+		} else {
+			g.logCtx.PythonTrainStatus = coglog.StatusPassed
+		}
+		return nil
+	}
+
 	if strings.TrimSpace(newContent) == "" {
 		if predictorType == PredictorTypePredict {
 			g.logCtx.PythonPredictStatus = coglog.StatusPassed
@@ -336,8 +357,8 @@ func (g *MigratorV1ToV1Fast) runPythonScript(ctx context.Context, file *zip.File
 	} else {
 		g.logCtx.PythonTrainStatus = coglog.StatusAccepted
 	}
-	pythonFilepath := filepath.Join(dir, pythonFilename)
-	pythonFile, err := os.Create(pythonFilepath)
+
+	pythonFile, err = os.Create(pythonFilepath)
 	if err != nil {
 		return util.WrapError(err, "Could not open python predictor file")
 	}

test-integration/test_integration/fixtures/migration-no-python-changes-project/cog.yaml

@@ -0,0 +1,25 @@
+# Configuration for Cog ⚙️
+# Reference: https://cog.run/yaml
+
+build:
+  # set to true if your model requires a GPU
+  gpu: true
+
+  # a list of ubuntu apt packages to install
+  system_packages:
+    - "libgl1-mesa-glx"
+    - "libglib2.0-0"
+
+  # python version in the form '3.11' or '3.11.4'
+  python_version: "3.11"
+
+  # path to a Python requirements.txt file
+  python_requirements: requirements.txt
+
+  # commands run after the environment is setup
+  run:
+  - curl -o /usr/local/bin/pget -L "https://github.com/replicate/pget/releases/latest/download/pget_$(uname -s)_$(uname -m)"
+  - chmod +x /usr/local/bin/pget
+
+# predict.py defines how predictions are run on your model
+predict: "predict.py:Predictor"