@classmethod
  def filter_packages_by_ttl(cls, packages, ttl, now=None):
    now = now if now is not None else time.time()
    return [package for package in packages
        if package.remote or package.local and (os.path.getmtime(package.local_path) - now) < ttl]
dataset/ETHPy150Open pantsbuild/pex/pex/resolver.py/CachingResolver.filter_packages_by_ttl/swapped operands of `-`