diff --git a/transpile_python/service.go b/transpile_python/service.go
index bab29fa..74e19ca 100644
--- a/transpile_python/service.go
+++ b/transpile_python/service.go
@@ -447,7 +447,18 @@ func handleSelectorExpr(expr ast.Expr) string {
 }
 
 func handleIndexExpr(expr *ast.IndexExpr) string {
-	code := expr.X.(*ast.Ident).String()
+	code := ""
+
+	switch x := expr.X.(type) {
+	case *ast.Ident:
+		code += x.String()
+	// case *ast.CallExpr:
+	//     code += x....
+	default:
+		spew.Dump(x)
+		code += "unknown handleIndexExpr"
+	}
+
 	code += "["
 	code += expr.Index.(*ast.BasicLit).Value
 	code += "]"
diff --git a/transpile_python/service_test.go b/transpile_python/service_test.go
index 8d49604..e75ede5 100644
--- a/transpile_python/service_test.go
+++ b/transpile_python/service_test.go
@@ -175,6 +175,20 @@ main()
 			Compare(source, expected)
 		})
 
+		XIt("Assignments += by index of function call", func() {
+			source := `package test
+				func main() {
+					vkl_iface = vkl_iface_part(1)[0]
+				}
+				`
+			expected := `from skidl import *
+def main():
+	vkl_iface = vkl_iface_part(1)[0]
+main()
+`
+			Compare(source, expected)
+		})
+
 		It("Assignments &", func() {
 			source := `package test
 				func main() {