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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _inject_constructor(self, cls, func, name, resolution_level, keep, trace):
 """ Modifying Methods in Place - after the recipe 15.7 in the Python Cookbook by Ken Seehof. The original constructors may be restored later. """

        try:
            constructor = cls.__init__
        except AttributeError:
            def constructor(self, *_args, **_kwargs):
                pass

        # Possible name clash between keyword arguments of the tracked class'
        # constructor and the curried arguments of the injected constructor.
        # Therefore, the additional argument has a 'magic' name to make it less
        # likely that an argument name clash occurs.
        self._observers[cls] = _ClassObserver(constructor,
                                              name,
                                              resolution_level,
                                              keep,
                                              trace)
        cls.__init__ = instancemethod(
            lambda *args, **kwds: func(self._observers[cls], *args, **kwds),
            None,
            cls
        )