基于Python中DataFrame中的值求和?
您好,我有如下数据帧:基于Python中DataFrame中的值求和?,python,pandas,dataframe,sum,Python,Pandas,Dataframe,Sum,您好,我有如下数据帧: df = pd.DataFrame({"ID" : ["1", "2", "1", "1"], "code" : ["T", "N", "N", "T"], "amount" :
df = pd.DataFrame({"ID" : ["1", "2", "1", "1"],
"code" : ["T", "N", "N", "T"],
"amount" : [100, 200, 300 ,400]})
我需要计算一下
df = pd.DataFrame({"ID" : ["1", "2", "1", "1"],
"code" : ["T", "N", "N", "T"],
"amount" : [100, 200, 300 ,400]})
试试这个:
new_df.groupby(['ID','code']).agg(sum).unstack()
new_df.columns = ['Sum T','Sum N']
new_df = new_df.reset_index()
没有创建多索引还有其他方法吗?这是一种优化的方法。您可以再次重置索引。我更新了我的答案以匹配预期的输出。非常感谢!我给了你最好的答案