import io
import os
import sys

def main():
    class MyException(Exception): pass
    class MyFileIO(io.FileIO):
        def __setattr__(self, name, value):
            if name == "name":
                raise MyException("blocked setting name")
            return super(MyFileIO, self).__setattr__(name, value)
    fd = os.open(__file__, os.O_RDONLY)
    try:
        MyFileIO(fd)
    except MyException:
        pass
    else:
        return
    # exception set is cleared after except clause (3.x)
    if sys.version_info[0] < 3:
        sys.exc_clear()
    res = os.close(fd)
    assert(res is None)

if __name__ == '__main__':
    main()