【python】关闭 os.popen()和subprocess.Popen()方法

cmd = os.popen('adb shell dumpsys activity|findstr mFocus').read()

执行上述代码后会os.popen后台并不会结束

需要改为

cmd = os.popen('adb shell dumpsys activity|findstr mFocus')
data = cmd.read()
cmd.close()

 

若是实时抓取log，或者ping之类的命令，建议使用subprocess.Popen

import subprocess,os
from signal import SIGTERM
cmd = 'ping www.baidu.com'
process = subprocess.Popen(cmd, shell=True,preexec_fn=os.setsid)
time.sleep(5)
print("停止")
os.killpg(process.pid,SIGTERM)
print("cmd关闭")

 或者通过

import os
cmd = "adb  logcat  > 1.txt"
kill_cmd = 'ps -ef | grep "adb logcat" | grep -v grep | awk "{print $2}" | xargs kill -9'
os.popen(cmd)
time.sleep(3)
os.popen(kill_cmd)

 或者通过adb logcat -d