python中reader的next用法

python中有个csv包(build-in),该包有个reader,按行读取csv文件中的数据

reader.next()作用:打印csv文件中的第一行标题header

(python3中的用法)

allElectronicsData = open(r'C:/pydata/AllElectronics.csv', 'rt')
reader = csv.reader(allElectronicsData)
headers = next(reader)

(python2中的用法)

allElectronicsData = open(r'C:/pydata/AllElectronics.csv', 'rb')
reader = csv.reader(allElectronicsData)
headers = reader.next()

总结

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