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)