D:\文档\pythonProject\venv\Scripts\33.py:22: SettingWithCopyWarning: A value is trying to be set on a copy of a slice from a DataFrame. Try using .loc[row_indexer,col_indexer] = value instead See the caveats in the documentation: https://pandas.pydata.org/pandas-docs/stable/user_guide/indexing.html#returning-a-view-versus-a-copy Set[YMD] = pd.to_datetime(Set[YMD],format='%Y-%m-%d') D:\文档\pythonProject\venv\Scripts\33.py:23: SettingWithCopyWarning: A value is trying to be set on a copy of a slice from a DataFrame. Try using .loc[row_indexer,col_indexer] = value instead See the caveats in the documentation: https://pandas.pydata.org/pandas-docs/stable/user_guide/indexing.html#returning-a-view-versus-a-copy Set['year'] = Set[YMD].dt.year Traceback (most recent call last): File "D:\文档\pythonProject\venv\Scripts\33.py", line 30, in <module> HE2 = HE[['Ind','Accper','TSale'] NameError: name 'HE' is not defined

根据报错信息，代码中存在两个问题：

1. `SettingWithCopyWarning`警告：这个警告通常发生在尝试对DataFrame的切片副本进行赋值时。为了避免此警告，建议使用`.loc[row_indexer,col_indexer] = value`来赋值。具体来说，可以将`Set[YMD] = pd.to_datetime(Set[YMD],format='%Y-%m-%d')`替换为`Set.loc[:, YMD] = pd.to_datetime(Set[YMD], format='%Y-%m-%d')`，将`Set['year'] = Set[YMD].dt.year`替换为`Set.loc[:, 'year'] = Set[YMD].dt.year`。

2. `NameError: name 'HE' is not defined`错误：这个错误说明在代码的某个地方使用了未定义的变量`HE`。可能是在之前的代码部分定义了`HE`变量，但在这段代码中没有给出。请检查一下是否需要在这段代码之前定义`HE`变量，并确保其在使用前已经赋值。

对于上述问题，需要根据实际情况进行修改和调整。