大部分的程序是這樣的：

from subprocess import Popen, PIPE, STDOUTp = Popen(cmd, stdout=PIPE, stderr=STDOUT, shell=True) while True:print(p.stdout.readline())if not line: break

但是由于子程序沒有進行 flush 的話，會把結果緩存到系統中。導致程序運行完成，上面的程序才會進行打出（會一直卡在readline這個函數）。

解決方法：

p = subprocess.Popen(cmd, stdout=subprocess.PIPE, bufsize=1) for line in iter(p.stdout.readline, b''):print line, p.stdout.close() p.wait()

實際弱口令我是這樣寫的

import subprocess #Popenproc = subprocess.Popen(medusaCMD, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, shell=True) for line in iter(proc.stdout.readline, 'b'):print lineif not subprocess.Popen.poll(proc) is None:if line == "":break proc.stdout.close()

記小的寫法

proc = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE, stderr=subprocess.STDOUT) try:while True:buff = proc.stdout.readline()print(buff)if buff == '' and proc.poll() != None:breakelse:..... except Exception:data["status"] = -1 finally:return data

單次管道輸出寫法

方法一

# -*- coding: UTF-8 -*-import re import sys import subprocess from subprocess import Popen, PIPE, STDOUT#docker_info = {"CONTAINER ID":"", "NAME":"", "CPU %":"", "MEM USAGE / LIMIT":"", \ # "MEM %":"", "NET I/O":"", "BLOCK I/O":"", "PIDS":""} docker_list = []cmd = "docker stats -a --no-stream" proc = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE, stderr=subprocess.STDOUT) try:buff = proc.communicate()stritem = buff[0]str_list = re.split(r' +|\n', stritem)for i in range(8, len(str_list)-1):if i % 8 == 0:value = 0docker_info = {}docker_info["CONTAINER ID"] = str_list[i]else:value += 1if value == 1:docker_info["NAME"] = str_list[i]elif value == 2:docker_info["CPU %"] = str_list[i]elif value == 3:docker_info["MEM USAGE / LIMIT"] = str_list[i]elif value == 4:docker_info["MEM %"] = str_list[i]elif value == 5:docker_info["NET I/O"] = str_list[i]elif value == 6:docker_info["BLOCK I/O"] = str_list[i]elif value == 7:docker_info["PIDS"] = str_list[i]docker_list.append(docker_info)value = 0print docker_list except Exception as e:print "error", esys.exit(1)proc.stdout.close()

方法二（待測試）

import subprocess from multiprocessing.dummy import Pool as ThreadPoolcommand = poc + ' -t ' + ip + ' -p ' + port result = subprocess.getoutput(command) if 'WARNING: SERVER IS VULNERABLE' in result:result = AAAAA else:result = BBBBBB

?

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