Fix import

qiskit/pulse/library/parametric_pulses.py

@@ -37,12 +37,14 @@ class ParametricPulseShapes(Enum):
         new_supported_pulse_name = library.YourPulseWaveformClass
 """
 from __future__ import annotations
+
+import sys
 from abc import abstractmethod
 from typing import Any
 
 import math
 import numpy as np
-from typing_extensions import TypeGuard
+
 
 from qiskit.circuit.parameterexpression import ParameterExpression
 from qiskit.pulse.exceptions import PulseError
@@ -52,6 +54,11 @@ class ParametricPulseShapes(Enum):
 from qiskit.pulse.library.waveform import Waveform
 from qiskit.utils.deprecation import deprecate_func
 
+if sys.version_info >= (3, 11):
+    from typing import TypeGuard
+else:
+    from typing_extensions import TypeGuard
+
 
 class ParametricPulse(Pulse):
     """The abstract superclass for parametric pulses.