Python读取文件的三种方式及比较

本次实验的文件是一个60M的文件,共计392660行内容。

程序一:

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:

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:

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。

 

 

 

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