def rmtree_errorhandler(func, path, exc_info):
    """
    On Windows, some files are read-only (e.g. in in .svn dirs), so when
    rmtree() tries to remove them, an exception is thrown.
    We catch that here, remove the read-only attribute, and hopefully
    continue without problems.
    """
    exctype, value = exc_info[:2]
    # looking for a windows error
    if exctype is not WindowsError or str(value) not in 'Access is denied':
        raise
    # file type should currently be read only
    if ((os.stat(path).st_mode & stat.S_IREAD) != stat.S_IREAD):
        raise
    # convert to read/write
    os.chmod(path, stat.S_IWRITE)
    # use the original function to repeat the operation
    func(path)
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.5/django/utils/_os.py/rmtree_errorhandler/swapped operands of `not in`