Resolve "python_syntax is python2 only"

Closes #48 (closed)

ci-templates/auto-rules/no-default.yml

@@ -49,6 +49,29 @@ industrial_ci_humble:
     - if: $DEFAULT_DISTRO == "humble"
     - if: $BUILD_HUMBLE
 
+.py3_template:
+  rules:
+    - if: $DEFAULT_DISTRO == "noetic"
+      when: always
+    - if: $BUILD_NOETIC
+      when: always
+    - if: $DEFAULT_DISTRO == "humble"
+      when: always
+    - if: $BUILD_HUMBLE
+      when: always
+  when: always
+
+.py2_template:
+  rules:
+    - if: $DEFAULT_DISTRO == "kinetic"
+      when: always
+    - if: $BUILD_KINETIC
+      when: always
+    - if: $DEFAULT_DISTRO == "melodic"
+      when: always
+    - if: $BUILD_MELODIC
+      when: always
+
 ddeploy:
   extends: .ddeploy
   rules: