Python读取文件内容的三种方式并比较
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。