最近在用subprocess中的Popen做个磁盘监控小程序，但是在使用ps = Popen("df -h", shell=True, stdout=PIPE, stderr=PIPE)之后，再使用output_lines = ps.stdout.readlines()的时候，output_lines总是内容为空，有哪位知道是什么原因么？
btw：我是在windows下设计这个程序的
代码
#
!/usr/bin/env python
# coding=utf-8
from subprocess import Popen, PIPE
import re
def disk_space(pattern = " 2[0-9]% " , message = " CAPACITY WARNING " ):
# # take shell command output
ps = Popen( " df -h " , shell = True, stdout = PIPE, stderr = PIPE)
output_lines = ps.stdout.readlines()
for line in output_lines:
line = line.strip()
if re.search(pattern, line):
print " %s %s " % (message, line)
if __name__ == ' __main__ ' :
disk_space
# coding=utf-8
from subprocess import Popen, PIPE
import re
def disk_space(pattern = " 2[0-9]% " , message = " CAPACITY WARNING " ):
# # take shell command output
ps = Popen( " df -h " , shell = True, stdout = PIPE, stderr = PIPE)
output_lines = ps.stdout.readlines()
for line in output_lines:
line = line.strip()
if re.search(pattern, line):
print " %s %s " % (message, line)
if __name__ == ' __main__ ' :
disk_space
转播
