pandas读取文件

• 读取csv文件

    data = pd.read_csv(f1,nrows =20)
    s = data.loc[:, :]
    s = s.loc[:, ['machine_id', 'question_id', 'answer_right']]
    s = s.values
    s = s.tolist()

• 读取xlsx文件

    data = pd.read_excel('13.3.xlsx')
    s = data.loc[:,:]
    s = s.loc[:,['知识点标注','计算题'']]
    s = s.ix[:].values
    s = s.tolist()