使用如下python代码：
import os
dir = os.getcwd()
subdirlist = os.listdir(dir)
total = 0
for subdir in subdirlist:
path = os.path.join(dir, subdir)
print(path)
with open(path) as f:
line = len(f.readlines())
total = total + line
print("total lines num: %d"%total)