df[“age”] 25df[ df[“age”] 25 ]importpandasaspdimportnumpyasnpimportmatplotlib.pyplotasplt dfpd.DataFrame(data{age:[20,30,40,10],name:[张三,李四,王五,赵六]},columns[name,age],index[101,104,103,102],)print()print(df)print()print(df[age]25)print(df[df[age]25])