本文实例讲述了Python读取文件内容的三种常用方式。分享给大家供大家参考,具体如下:
本次实验的文件是一个60M的文件,共计392660行内容。
程序一:
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def one(): start = time.clock() fo = open ( file , 'r' ) fc = fo.readlines() num = 0 for l in fc: tup = l.rstrip( '\n' ).rstrip().split( '\t' ) num = num + 1 fo.close() end = time.clock() print end - start print num |
运行结果:0.812143868027s
程序二:
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def two(): start = time.clock() num = 0 with open ( file , 'r' ) as f: for l in f: tup = l.rstrip( '\n' ).rstrip().split( '\t' ) num = num + 1 end = time.clock() times = (end - start) print times print num |
运行时间:0.74222778078
程序三:
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def three(): start = time.clock() fo = open ( file , 'r' ) l = fo.readline() num = 0 while l: tup = l.rstrip( '\n' ).rstrip().split( '\t' ) l = fo.readline() num = num + 1 end = time.clock() print end - start print num |
运行时间:1.02316120797
由结果可得出,程序二的速度最快。
希望本文所述对大家Python程序设计有所帮助。
原文链接:http://www.cnblogs.com/6tian/p/5886284.html