Support python3.7

Qiskit · Oct 19, 2022 · 0f02d6a · 0f02d6a
1 parent 17d2a46
commit 0f02d6a
Showing 1 changed file with 8 additions and 2 deletions.
diff --git a/qiskit/pulse/builder.py b/qiskit/pulse/builder.py
@@ -481,6 +481,12 @@
 from qiskit.pulse.schedule import Schedule, ScheduleBlock
 from qiskit.pulse.transforms.alignments import AlignmentKind
 
+if sys.version_info >= (3, 8):
+     from functools import singledispatchmethod  # pylint: disable=no-name-in-module
+ else:
+     from singledispatchmethod import singledispatchmethod
+
+
 #: contextvars.ContextVar[BuilderContext]: active builder
 BUILDER_CONTEXTVAR = contextvars.ContextVar("backend")
 
@@ -760,7 +766,7 @@ def append_block(self, context_block: ScheduleBlock):
         if len(context_block) > 0:
             self._context_stack[-1].append(context_block)
 
-    @functools.singledispatchmethod
+    @singledispatchmethod
     def inject_subroutine(
         self,
         subroutine: Union[Schedule, ScheduleBlock],
@@ -797,7 +803,7 @@ def _(self, schedule: Schedule):
             return
         self._context_stack[-1].append(self._naive_typecast_schedule(schedule))
 
-    @functools.singledispatchmethod
+    @singledispatchmethod
     def call_subroutine(
         self,
         subroutine: Union[circuit.QuantumCircuit, Schedule, ScheduleBlock],