def deprecated_init(super_init_func, arg_names, ignore=tuple(),
                    deprecated_aliases={}, deprecated_defaults={},
                    category=PyGIDeprecationWarning,
                    stacklevel=2):
    """Wrapper for deprecating GObject based __init__ methods which specify
    defaults already available or non-standard defaults.

    :param callable super_init_func:
        Initializer to wrap.
    :param list arg_names:
        Ordered argument name list.
    :param list ignore:
        List of argument names to ignore when calling the wrapped function.
        This is useful for function which take a non-standard keyword that is munged elsewhere.
    :param dict deprecated_aliases:
        Dictionary mapping a keyword alias to the actual g_object_newv keyword.
    :param dict deprecated_defaults:
        Dictionary of non-standard defaults that will be used when the
        keyword is not explicitly passed.
    :param Exception category:
        Exception category of the error.
    :param int stacklevel:
        Stack level for the deprecation passed on to warnings.warn
    :returns: Wrapped version of ``super_init_func`` which gives a deprecation
        warning when non-keyword args or aliases are used.
    :rtype: callable
    """
    # We use a list of argument names to maintain order of the arguments
    # being deprecated. This allows calls with positional arguments to
    # continue working but with a deprecation message.
    def new_init(self, *args, **kwargs):
        """Initializer for a GObject based classes with support for property
        sets through the use of explicit keyword arguments.
        """
        # Print warnings for calls with positional arguments.
        if args:
            warnings.warn('Using positional arguments with the GObject constructor has been deprecated. '
                          'Please specify keyword(s) for "%s" or use a class specific constructor. '
                          'See: https://wiki.gnome.org/PyGObject/InitializerDeprecations' %
                          ', '.join(arg_names[:len(args)]),
                          category, stacklevel=stacklevel)
            new_kwargs = dict(zip(arg_names, args))
        else:
            new_kwargs = {}
        new_kwargs.update(kwargs)

        # Print warnings for alias usage and transfer them into the new key.
        aliases_used = []
        for key, alias in deprecated_aliases.items():
            if alias in new_kwargs:
                new_kwargs[key] = new_kwargs.pop(alias)
                aliases_used.append(key)

        if aliases_used:
            warnings.warn('The keyword(s) "%s" have been deprecated in favor of "%s" respectively. '
                          'See: https://wiki.gnome.org/PyGObject/InitializerDeprecations' %
                          (', '.join(deprecated_aliases[k] for k in sorted(aliases_used)),
                           ', '.join(sorted(aliases_used))),
                          category, stacklevel=stacklevel)

        # Print warnings for defaults different than what is already provided by the property
        defaults_used = []
        for key, value in deprecated_defaults.items():
            if key not in new_kwargs:
                new_kwargs[key] = deprecated_defaults[key]
                defaults_used.append(key)

        if defaults_used:
            warnings.warn('Initializer is relying on deprecated non-standard '
                          'defaults. Please update to explicitly use: %s '
                          'See: https://wiki.gnome.org/PyGObject/InitializerDeprecations' %
                          ', '.join('%s=%s' % (k, deprecated_defaults[k]) for k in sorted(defaults_used)),
                          category, stacklevel=stacklevel)

        # Remove keywords that should be ignored.
        for key in ignore:
            if key in new_kwargs:
                new_kwargs.pop(key)

        return super_init_func(self, **new_kwargs)

    return new_init