From ea5294ccd7c0b7d740535b65ea03b272b0d56179 Mon Sep 17 00:00:00 2001
From: changsookim <>
Date: Tue, 29 Oct 2024 12:20:47 +0400
Subject: [PATCH 1/2] feat: unsupported native gates

---
 src/qibo/transpiler/unroller.py   | 9 +++++++--
 tests/test_transpiler_unroller.py | 4 ++--
 2 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/src/qibo/transpiler/unroller.py b/src/qibo/transpiler/unroller.py
index ee6e15d0a1..e28cebc0eb 100644
--- a/src/qibo/transpiler/unroller.py
+++ b/src/qibo/transpiler/unroller.py
@@ -4,7 +4,7 @@
 
 from qibo import gates
 from qibo.backends import _check_backend
-from qibo.config import raise_error
+from qibo.config import log, raise_error
 from qibo.models import Circuit
 from qibo.transpiler._exceptions import DecompositionError
 from qibo.transpiler.decompositions import (
@@ -22,7 +22,11 @@ class FlagMeta(EnumMeta):
 
     def __getitem__(cls, keys):
         if isinstance(keys, str):
-            return super().__getitem__(keys)
+            try:
+                return super().__getitem__(keys)
+            except KeyError:
+                log.info(f"Native gate {keys} is not supported by qibo.")
+                return super().__getitem__("NONE")
         return reduce(or_, [cls[key] for key in keys])  # pylint: disable=E1136
 
 
@@ -44,6 +48,7 @@ class NativeGates(Flag, metaclass=FlagMeta):
         - :class:`qibo.gates.gates.CNOT`
     """
 
+    NONE = 0
     I = auto()
     Z = auto()
     RZ = auto()
diff --git a/tests/test_transpiler_unroller.py b/tests/test_transpiler_unroller.py
index d3aa3e9ba9..e09147b179 100644
--- a/tests/test_transpiler_unroller.py
+++ b/tests/test_transpiler_unroller.py
@@ -27,8 +27,8 @@ def test_native_gate_str_list():
     for gate in testlist:
         assert NativeGates[gate] in natives
 
-    with pytest.raises(KeyError):
-        NativeGates[["qi", "bo"]]  # Invalid gate names
+    natives = NativeGates[["qi", "bo"]]  # Invalid gate names
+    assert natives == NativeGates(0)
 
 
 def test_translate_gate_error_1q():

From 23423a9b0b45d5acddd839eb19ceac3197c82954 Mon Sep 17 00:00:00 2001
From: changsookim <>
Date: Tue, 29 Oct 2024 16:53:08 +0400
Subject: [PATCH 2/2] fix: remove log

---
 src/qibo/transpiler/unroller.py | 1 -
 1 file changed, 1 deletion(-)

diff --git a/src/qibo/transpiler/unroller.py b/src/qibo/transpiler/unroller.py
index e28cebc0eb..17e2e385aa 100644
--- a/src/qibo/transpiler/unroller.py
+++ b/src/qibo/transpiler/unroller.py
@@ -25,7 +25,6 @@ def __getitem__(cls, keys):
             try:
                 return super().__getitem__(keys)
             except KeyError:
-                log.info(f"Native gate {keys} is not supported by qibo.")
                 return super().__getitem__("NONE")
         return reduce(or_, [cls[key] for key in keys])  # pylint: disable=E1136