iframe-proxy | Sunbelt Computer Software

41 lines (30 loc) · 725 Bytes

#!/usr/bin/env python

# -*- encoding: utf-8 -*-

"""

Topic:

利用generator模仿tail -f www.log | grep "python"

对变化的日志文件持续查看含有python的行

Desc :

"""

import time

__author__ = 'Xiong Neng'

def tail(f):

f.seek(0, 2) # 移动到EOF

while True:

line = f.readline()

if not line:

time.sleep(0.2)

continue

yield line

def grep(lines, search_text):

for line in lines:

if search_text in line: yield line

def my_tail_search():

wwwlog = tail(open("www.log"))

pylines = grep(wwwlog, "python")

for line in pylines:

print(line)

def main():

pass

if __name__ == '__main__':

main()

Sunbelt Computer Software