SettingWithCopyWarning: A value is trying to be set on a copy of a slice from a DataFrame
SettingWithCopyWarning 是由于在使用 pandas DataFrame 时存在赋值的错误导致的警告。它通常发生在当你试图在一个副本上设置值而不是在原始数据上时。为了解决这个问题，可以使用 .loc 或 .iloc 对数据进行操作，这样就可以直接在原始数据上进行操作。
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