根据两个条件选择

Question

我无法弄清楚为什么这不起作用。 df2数据框应包含来自df的所有匹配两个条件的数据。

df2 = df.loc[df['area'] == "north" & df['product'] == "a"]

Answer 1

无论

df2=df.loc[df['area'] == "north"].loc[df['product'] == "a"]

或

df2 = df[(df["area"] == "north") & (df["product"] == "a")]

会做这个工作。