[Twisted-Python] Manhole info needed

[Vikas Kumar]

Hi,

Can somebody tell me what is the need of manhole in twisted? Specially I've
seen them in files like tap.py (twisted application process).

One usecase I've seen them is wrt ShellFactory classes:

manhole = ShellFactory()
            manhole.setService(self)

internet.TCPServer(<someservice_name>.config.dget('jsonapi.port') + 10000,
manhole, interface='127.0.0.1').setServiceParent(self)

Could somebody please tell me what is being tried to achieve over here in
the above code?
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