pip3 install scrapy

Collecting Scrapy

  Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.VerifiedHTTPSConnection object at 0x7f240d566e80>: Failed to establish a new connection: [Errno -3] Temporary failure in name resolution')': /simple/scrapy/

这种报错怎么处理？