1 files changed, 6 insertions, 0 deletions
diff --git a/scripts/gen-s-parser.py b/scripts/gen-s-parser.py
index 2f63efe70..a1b3a2701 100755
--- a/scripts/gen-s-parser.py
+++ b/scripts/gen-s-parser.py
@@ -14,6 +14,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+import sys
+
 instructions = [
     ("unreachable",    "makeUnreachable()"),
     ("nop",            "makeNop()"),
@@ -541,6 +543,10 @@ def generate_with_guard(generator, guard):
 
 
 def main():
+  if sys.version_info.major != 3:
+    import datetime
+    print("It's " + str(datetime.datetime.now().year) + "! Use Python 3!")
+    sys.exit(1)
   print_header()
   generate_with_guard(instruction_parser, "INSTRUCTION_PARSER")