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POStop reading process output in Python without hang?
 

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    <p>I have a Python program for Linux almost looks like this one :</p> <pre><code>import os import time process = os.popen("top").readlines() time.sleep(1) os.popen("killall top") print process </code></pre> <p>the program hangs in this line :</p> <pre><code>process = os.popen("top").readlines() </code></pre> <p>and that happens in the tools that keep update outputting like "Top"</p> <p>my best trials :</p> <pre><code>import os import time import subprocess process = subprocess.Popen('top') time.sleep(2) os.popen("killall top") print process </code></pre> <p>it worked better than the first one (it's kelled ), but it returns :</p> <pre><code>&lt;subprocess.Popen object at 0x97a50cc&gt; </code></pre> <p>the second trial :</p> <pre><code>import os import time import subprocess process = subprocess.Popen('top').readlines() time.sleep(2) os.popen("killall top") print process </code></pre> <p>the same as the first one. It hanged due to "readlines()"</p> <p>Its returning should be like this :</p> <pre><code>top - 05:31:15 up 12:12, 5 users, load average: 0.25, 0.14, 0.11 Tasks: 174 total, 2 running, 172 sleeping, 0 stopped, 0 zombie Cpu(s): 9.3%us, 3.8%sy, 0.1%ni, 85.9%id, 0.9%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 1992828k total, 1849456k used, 143372k free, 233048k buffers Swap: 4602876k total, 0k used, 4602876k free, 1122780k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 31735 Barakat 20 0 246m 52m 20m S 19.4 2.7 13:54.91 totem 1907 root 20 0 91264 45m 15m S 1.9 2.3 38:54.14 Xorg 2138 Barakat 20 0 17356 5368 4284 S 1.9 0.3 3:00.15 at-spi-registry 2164 Barakat 9 -11 164m 7372 6252 S 1.9 0.4 2:54.58 pulseaudio 2394 Barakat 20 0 27212 9792 8256 S 1.9 0.5 6:01.48 multiload-apple 6498 Barakat 20 0 56364 30m 18m S 1.9 1.6 0:03.38 pyshell 1 root 20 0 2880 1416 1208 S 0.0 0.1 0:02.02 init 2 root 20 0 0 0 0 S 0.0 0.0 0:00.02 kthreadd 3 root RT 0 0 0 0 S 0.0 0.0 0:00.12 migration/0 4 root 20 0 0 0 0 S 0.0 0.0 0:02.07 ksoftirqd/0 5 root RT 0 0 0 0 S 0.0 0.0 0:00.00 watchdog/0 9 root 20 0 0 0 0 S 0.0 0.0 0:01.43 events/0 11 root 20 0 0 0 0 S 0.0 0.0 0:00.00 cpuset 12 root 20 0 0 0 0 S 0.0 0.0 0:00.02 khelper 13 root 20 0 0 0 0 S 0.0 0.0 0:00.00 netns 14 root 20 0 0 0 0 S 0.0 0.0 0:00.00 async/mgr 15 root 20 0 0 0 0 S 0.0 0.0 0:00.00 pm </code></pre> <p>and save in the variable "process". Any I idea guys, I'm really stuck now ?</p>
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