python-eldoc-setup-code

python-eldoc-setup-code is a variable defined in `python.el'.
Its value is

"def __PYDOC_get_help(obj):\n    try:\n        import inspect\n        try:\n            str_type = basestring\n        except NameError:\n            str_type = str\n        if isinstance(obj, str_type):\n            obj = eval(obj, globals())\n        doc = inspect.getdoc(obj)\n        if not doc and callable(obj):\n            target = None\n            if inspect.isclass(obj) and hasattr(obj, '__init__'):\n                target = obj.__init__\n                objtype = 'class'\n            else:\n                target = obj\n                objtype = 'def'\n            if target:\n                args = inspect.formatargspec(\n                    *inspect.getargspec(target)\n                )\n                name = obj.__name__\n                doc = '{objtype} {name}{args}'.format(\n                    objtype=objtype, name=name, args=args\n                )\n        else:\n            doc = doc.splitlines()[0]\n    except:\n        doc = ''\n    print (doc)"

Documentation:
Python code to setup documentation retrieval.

You can customize this variable.