add PTT subcommands #545

Job	Run time
Test Python 3.8 on ubuntu-latest	1m 35s
Test Python 3.9 on ubuntu-latest	1m 39s
Test Python 3.10 on ubuntu-latest	1m 41s
Test Python 3.11 on ubuntu-latest	1m 40s
Test Python 3.8 on macos-latest	3m 58s
Test Python 3.9 on macos-latest	5m 56s
Test Python 3.10 on macos-latest	4m 42s
Test Python 3.11 on macos-latest	4m 40s
Test Python 3.8 on windows-latest	7m 55s
Test Python 3.9 on windows-latest	6m 22s
Test Python 3.10 on windows-latest	6m 27s
Test Python 3.11 on windows-latest	6m 20s
	52m 55s

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