读取完csv文件,进行运算,重新复制弹出A value is trying to be set on a copy of a slice from a DataFrame.读取完csv文件,进行运算,重新复制弹出A value is trying to be set
读取完csv文件,进行运算,重新复制弹出A value is trying to be set on a copy of a slice from a DataFrame.读取完csv文件,进行运算,重新复制弹出A value is trying to be set