Python url请求提示certificate verify failed unable to get local issuer certificate

当使用requests.get获取https链接时，提示如下错误：

ssl.SSLCertVerificationError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1056)

最方便的手段是直接设置不验证，即：

 requests.get('https://example.com', verify=False)