csv读写

import csv





def main():
    header =['ID','Username','Password','Age','Country']
    rows = [(1001,'qiye','qiye_pass',24,'China'),
            (1002,'Mary','Mary_pass',20,'USA'),
            (1003,'Jack','Jack_pass','USA')]
    # with open('demo.csv','w',newline="") as f:      # csv 文件写入
    #     f_csv = csv.writer(f)
    #     f_csv.writerow(header)
    #     f_csv.writerows(rows)



    # with open('demo.csv','r') as f:       # csv 文件读取输出
    #     f_csv = csv.reader(f)
    #     header = next(f_csv)
    #     print(header)
    #     for raw in f_csv:
    #         print(raw)
    with open('demo.csv','r') as f:       # csv 文件读取输出  (首推....)
        f_csv = csv.DictReader(f)
        for row in f_csv:
            print(row.get('Username'),row.get('Password'))






if __name__ == '__main__':
    main()