我在数据帧中有一列,我试图从字符串中提取8位数字.我该怎么做
Input
Shipment ID
20180504-S-20000
20180514-S-20537
20180514-S-20541
20180514-S-20644
20180514-S-20644
20180516-S-20009
20180516-S-20009
20180516-S-20009
20180516-S-20009
Expected Output
Order_Date
20180504
20180514
20180514
20180514
20180514
20180516
20180516
20180516
20180516
我try 了下面的代码,但没有成功.
data['Order_Date'] = data['Shipment ID'][:8]