我试图在Python中找到一种方法来运行其他程序,从而:
可以分别记录正在运行的程序的stdout和stderr。
可以实时查看正在运行的程序的stdout和stderr,这样,如果子进程挂起,则用户可以看到。(即,我们不等待执行完成才将stdout / stderr打印给用户)
奖励标准:正在运行的程序不知道它是通过python运行的,因此不会做意外的事情(例如,将其输出分块而不是实时打印,或者退出,因为它需要一个终端来查看其输出) 。这个小的标准几乎意味着我们将需要使用pty。
这是我到目前为止所得到的...方法1:
def method1(command):
## subprocess.communicate() will give us the stdout and stderr sepurately,
## but we will have to wait until the end of command execution to print anything.
## This means if the child process hangs, we will never know....
proc=subprocess.Popen(command, stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True, executable='/bin/bash')
stdout, stderr = proc.communicate() # record both, but no way to print stdout/stderr in real-time
print ' ######### REAL-TIME ######### '
######## Not Possible
print ' ########## RESULTS ########## '
print 'STDOUT:'
print stdout
print 'STDOUT:'
print stderr
方法2
def method2(command):
## Using pexpect to run our command in a pty, we can see the child's stdout in real-time,
## however we cannot see the stderr from "curl google.com", presumably because it is not connected to a pty?
## Furthermore, I do not know how to log it beyond writing out to a file (p.logfile). I need the stdout and stderr
## as strings, not files on disk! On the upside, pexpect would give alot of extra functionality (if it worked!)
proc = pexpect.spawn('/bin/bash', ['-c', command])
print ' ######### REAL-TIME ######### '
proc.interact()
print ' ########## RESULTS ########## '
######## Not Possible
要尝试这些方法,您需要 import sys,subprocess,pexpect
pexpect是纯python,可以与
sudo pip安装pexpect
我认为解决方案将涉及python的pty模块-这有点像是一种妖术,我找不到任何知道如何使用的人。也许这样就知道了:)作为一个提示,我建议您使用“ curl www.google.com”作为测试命令,因为出于某种原因它会在stderr上显示其状态:D
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