使用python统计文件行数示例分享

代码如下:

import time

def block(file,size=65536): while true: nb = file.read(size) if not nb: break yield nb

def getlinecount(filename): with open(filename,”r”,encoding=”utf-8″) as f: return sum(line.count(“\n”) for line in block(f))if __name__ == “__main__”: import sys import os if len(sys.argv) != 2: print(“error imput argument”) sys.exit(-1) if not os.path.isfile(sys.argv[1]) : print(sys.argv + ” is not a file”) sys.exit(-1) start_time = time.time() print(getlinecount(sys.argv[1])) print(time.time() – start_time ,”seconds”)

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