[Python-projects] PyLint determines class "newness" incorrectly

[skip at pobox.com]

Given this little program:

    import pygtk
    pygtk.require("2.6")
    import gobject

    class A(gobject.GObject):
        def __init__(self, val):
            gobject.GObject.__init__(self)
            self._val = val

        def _get_val(self):
            print "get"
            return self._val

        def _set_val(self, val):
            print "set"
            self._val = val

        val = property(_get_val, _set_val)

    if __name__ == "__main__":
        print gobject.GObject.__bases__
        a = A(7)
        print a.val
        a.val = 6
        print a.val

When I run it, I get this output:

    (<type 'object'>,)
    get
    7
    set
    get
    6

However, PyLint reports:

    gobject_subclass.py:8: [W, A.__init__] __init__ method from a non direct base class <logilab.astng.Yes object at 0x8253d4c> is called
    gobject_subclass.py:19: [W, A] Use of "property" on an old style class

It clearly has messed something up about the lineage of the A class.  One,
the logilab.astng.Yes class is not involved with the A class.  (I believe I
reported this before.)  Two, A is a new-style class (because gobject.GObject
is, as the program output demonstrates).

-- 
Skip Montanaro - skip at pobox.com - http://www.mojam.com/
"On the academic side, effort is too often expended on finding precise
answers to the wrong questions." Baxter & Rennie, in "Financial Calculus"