import csv

 filename = 'ch02-data.csv'

 data = []

 try:

     with open(filename) as f://用with语句将数据文件绑定到对象f

         reader = csv.reader(f)

         header = next(reader)//Python 3.X 用的是next()

         data = [row for row in reader]

 except csv.Error as e:

     print('Error reading CSV file at line %s: %s' % (reader.line_num,e) )

     sys.exit(-1)

 if header:

     print(header)

     print("=======================")

 for row in data:

     print(row)