pyupgrade --py39-plus

qutil/caching.py

qutil/domains.py

qutil/functools.py

qutil/hardware/smart_test.py

qutil/image.py

qutil/io.py

qutil/itertools.py

qutil/linalg.py

qutil/matlab.py

qutil/misc.py

qutil/pandas_tools.py

qutil/plotting/core.py

qutil/plotting/live_view.py

qutil/qcodes.py

qutil/signal_processing/_common.py

qutil/signal_processing/fourier_space.py

qutil/signal_processing/real_space.py

qutil/ui/core.py

qutil/ui/gate_layout/core.py