def __repr__(self):
        return "<NamedRequirements({}{})>".format(
            self.name,
            ", filename='{}'".format(self.filename.name) if self.filename
            else "")
def __init__(self):
        self._ignore_sigint_lock = threading.Lock()
        self._threads_ignoring_sigint = 0
        self._ignoring_sigint_v2_engine = False