我有以下数据框:
A B C D
0 NaN 2.0 NaN 0
1 3.0 4.0 NaN 1
2 NaN NaN NaN 5
3 NaN 3.0 NaN 4
现在我想用B或D中的值填充A的空值,即,如果B中的值是Null,则要检查D。所以结果数据帧看起来像这样。
A B C D
0 2.0 2.0 NaN 0
1 3.0 4.0 NaN 1
2 5 NaN NaN 5
3 3.0 3.0 NaN 4
我可以使用以下代码执行此操作:
df['A'] = df['A'].fillna(df['B'])
df['A'] = df['A'].fillna(df['D'])
但是我想一行完成,该怎么做?
答案 0 :(得分:3)
您可以简单地将两个ModifyWordPartButton
链接起来:
render()
或将this.props.children
与this.props.children.map(
child => {
React.cloneElement(child, this.state)
}
)
一起使用:
IconButton
答案 1 :(得分:2)
如果因为许多列更好而不需要链,则使用回填缺失值,并按位置填充第一列:
public class AResponse
{
public string Message { get; set; }
public bool Flag { get; set; }
}
public class BResponse
{
public string Message { get; set; }
public int Count { get; set; }
}
[Route("a")]
public class ControllerA : ApiController
{
[HttpGet]
public AResponse Get()
{
return new AResponse
{
Message = "Hello from A",
Flag = true
};
}
}
[Route("b")]
public class ControllerB : ApiController
{
[HttpGet]
public BResponse Get()
{
return new BResponse
{
Message = "Hello from B",
Count = 42
};
}
}