Pandas FutureWarning 链式赋值拷贝警告完整解决

Pandas FutureWarning 链式赋值拷贝警告完整解决文章目录Pandas FutureWarning 链式赋值拷贝警告完整解决一、报错信息二、报错原因三、临时屏蔽警告一、报错信息C:\Users\Administrator\AppData\Local\Temp\ipykernel_43344\1525745175.py:3: FutureWarning: A value is trying to beseton a copy of a DataFrame or Series through chained assignment using an inplace method. The behavior will changeinpandas3.0. This inplace method will never work because the intermediate object onwhichwe are setting values always behaves as a copy. For example, when doingdf[col].method(value, inplaceTrue), try usingdf.method({col: value}, inplaceTrue)or df[col]df[col].method(value)instead, to perform the operation inplace on the original object.二、报错原因你代码第 3 行出现链式索引 inplaceTruePandas 无法确定你操作的是原 DataFrame 还是临时副本未来 3.0 版本inplaceTrue会直接失效所以抛出警告。三、临时屏蔽警告如果暂时不想改代码仅隐藏提示importwarnings warnings.filterwarnings(ignore,categoryFutureWarning)注意只是隐藏提示底层数据修改不稳定正式代码必须修复写法。