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

python當使用requests.get獲取https鏈接時，提示如下錯誤：

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設置不驗證，即：

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