A value is trying to be set on a copy of a slice from a DataFrame
来源：互联网 发布：python 键盘输入 超时 编辑：程序博客网 时间：2024/05/16 01:41
在为DataFrame对象新增一列数据时，报错“A value is trying to be set on a copy of a slice from a DataFrame”，原因是操作的数据不是原始数据，而是原始数据的视图。
解决方案:在新增列之前，显示复制原始数据。示例如下：
data4 = train_data[['uid', 'forward_count', 'like_count']].copy()data4['forward_like_rate'] = data4['forward_count'] / (data4['like_count'] + 1)
阅读全文
0 0
- A value is trying to be set on a copy of a slice from a DataFrame
- 问题解决：SettingWithCopyWarning: A value is trying to be set on a copy of a slice from a DataFrame
- 如何通过pandas.apply进行整列和整行计算，以及如何处理A value is trying to be set on a copy of a slice from a DataFrame.错误
- could not be set to a 'string' value. You must set this property to a non-null value of type
- How to set a badge value on a UITabBarController item
- Trying to get a list of collections from mongoose
- Trying to attach a file from SD Card to email
- P18 (**) Extract a slice from a list
- P18 (**) Extract a slice from a list.
- 30.In which situation may the UNDO_RETENTION parameter be ignored, even if it is set to a value?
- Spatial index is slow when trying to find all the points within a range of a geocode.
- ERROR: must be superuser to COPY to or from a file
- Not allowed to return a result set from a trigger
- a label can only be part of a statement and a declaration is not a statement
- a label can only be part of a statement and a declaration is not a statement
- a label can only be part of a statement and a declaration is not a statement
- a label can only be part of a statement and a declaration is not a statement
- a label can only be part of a statement and a declaration is not a statement
- Cyclic Nacklace HDU
- Qt 学习之路 2（67）：访问网络（3）
- Sklearn学习（二）——数据预处理（Normalization）
- 如何把本地文件上传至github?
- InputStreamReader读取文件中文乱码问题
- A value is trying to be set on a copy of a slice from a DataFrame
- [caioj 1114]多叉苹果树---树形dp+01背包
- 10月5日 c语言 将一个二维数组行和列的元素互换，存到另一个二维数组中
- POJ 2376 浅谈一类区间覆盖问题的贪心解法
- Some thing about kali linux lite
- Codeforces Round #438 (868B) B Race Against Time
- 数组中的最大矩形（tiger基金的笔试题）
- C语言实验——输入数字星期，输出英文(switch语句)
- leetcode.array--31. Next Permutation
