def close(self):
        if self.closed:
            return
        try:
            files = itervalues(self.files)
        except AttributeError:
            files = ()
        for f in files:
            try:
                f.close()
            except Exception:
                pass
        self.closed = True
Closes all files.  If you put real :class:`file` objects into the
dataset/ETHPy150Open Eforcers/gae-flask-todo/lib/werkzeug/test.py/EnvironBuilder.close