无法安装openpyxl 2.3.3

Question

我正在anaconda工作2018.12; python 3.7.1; 而且我正在尝试安装openpyxl 2.3.3，但它给我一个错误

我尝试了pip install openpyxl == 2.3.3

pip install openpyxl==2.3.3 

那是错误：

  Retrying (Retry(total= 4/3/2/1/0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.VerifiedHTTPSConnection object at 0x00000221CAB4F2B0>: Failed to establish a new connection: [Errno 11001] getaddrinfo failed')': /simple/openpyxl/
  Could not find a version that satisfies the requirement openpyxl==2.3.3 (from versions: )
No matching distribution found for openpyxl==2.3.3

感谢您的帮助