Question

这个设计让我哭泣，下面的代码，请帮助

def runbatch(CMD,HOST):
    print CMD
    print HOST
    for host in HOST:
        env.host_string=host
        print CMD
        print env.host_string
        print "Execute command : \"%s\" at Host : %s" %(CMD,host)
        print "-------------------------------------------------"
        p=subprocess.Popen("run('ls')",shell=True,
            stderr=subprocess.PIPE,
            stdin=subprocess.PIPE)
        output = p.communicate()
        print output

错误显示

（无，“/ bin / sh：-c：第0行：意外令牌附近的语法错误'ls''\n/bin/sh: -c: line 0:运行（'ls'）'\ n”）

Answer 1

subprocess.Popen()在本地计算机上运行bash命令。 fabric提供的是在本地计算机上输入命令的方法，该命令已发送到远程计算机并在远程计算机上运行。为此，您需要fabfile.py（现在需要精确命名fabfile.py），其中存储结构fabric.api.run()命令，该命令实际上是Python命令而不是bash命令。 fabric.api.run()的参数是在远程计算机上运行的bash命令。例如。一个fabfile.py

from fabric.api import run from fabric.api import env def runcommand(): run(env.my_command)

使用此示例，您可以使用命令行fab --set my_command=some_bash_command -H remote_host_ip runcommand激活此远程调用。此字符串是您应在脚本中传递给subprocess.Popen()的字符串。例如。让我们调用你的脚本stackoverflow.py，它接受一个命令行参数，在远程机器上执行bash函数

import subprocess import sys p=subprocess.Popen("fab --set my_command="+sys.argv[1]+" -H localhost runcommand",shell=True, stderr=subprocess.PIPE, stdin=subprocess.PIPE) output = p.communicate() print output

示例运行：

Chip chip@ 12:10:58@ ~: python stackoverflow.py ls [localhost] Executing task 'runcommand' [localhost] run: ls [localhost] out: AllArms.py fines [localhost] out: Applications github [localhost] out: Box Sync grades_assgn1 [localhost] out: DFExperiment heuristic.py [localhost] out: Desktop honour-project-in-thompson-sampling [localhost] out: Documents jags_bin [localhost] out: Downloads latemath [localhost] out: Dropbox launchall.sh [localhost] out: FIT3080 launcher [localhost] out: GaussianExperiments launchucb.sh [localhost] out: GoogleDrive minuteSep5 [localhost] out: HierarchicalStan.py minutes22aug [localhost] out: IMG_6169.JPG model1.pkl [localhost] out: Library mydata [localhost] out: Monarch notes15Aug2016 [localhost] out: Movies notesSep12 [localhost] out: Music old-honour [localhost] out: PTSTuneBeta oracle.R [localhost] out: Pictures paper [localhost] out: Public parallelExperiments [localhost] out: Samsung people_to_mark_first [localhost] out: WindowFrame.class rezaPhone [localhost] out: WindowFrame.java spike.py [localhost] out: a.out stackoverflow.class [localhost] out: aaai.tar.gz stackoverflow.cpp [localhost] out: all_experiments stackoverflow.java [localhost] out: api4.csv stackoverflow.py [localhost] out: atlas test [localhost] out: boostlib test.py [localhost] out: codes_and_data.tar.gz test.txt [localhost] out: eclipse test1.html [localhost] out: emo test2.html [localhost] out: experimentlist testlib.py [localhost] out: fabfile.py testlib.pyc [localhost] out: fabfile.pyc uselib.py [localhost] out: file1 uselib.pyc [localhost] out: file2 [localhost] out: Done. Disconnecting from localhost... done. (None, "[localhost] Login password for 'hiennguyen': \n")

重要提示：以这种方式致电fab时，您可能需要：

启用ssh访问远程计算机。在这种情况下，远程计算机只是localhost

有时，远程主机要求您输入密码， >将提示您输入密码（我的机器就是这种情况）。如果您等待一段时间并且什么也看不见，您可能需要输入密码然后按ENTER键。

使用子进程

1 个答案: