记录过程'STDIN和STDOUT

Question

我想通过subprocess.Popen()运行一个进程并通过python shell与它通信，就像subprocess.Popen的常见行为一样。除此之外，我想推测性地将STDIN和STDOUT记录到日志文件中。

我该怎么办？

Answer 1

假设漫谈意味着散漫和散漫意味着所有在同一个文件中，那么下面的代码段就是你所要求的。

话语记录与源的鉴别和相互作用

覆盖其通信方法等类似的问题here

import subprocess 

def logcommunicate(self, s): 
    self.logfilehandle.write("Input "+s) 
    std = self.oldcommunicate(s) 

    self.logfilehandle.write("Output "+std[0]) 
    return std 

subprocess.Popen.oldcommunicate = subprocess.Popen.communicate 
subprocess.Popen.communicate = logcommunicate 
logfh = open("/tmp/communicate.log", "a") 

proc = subprocess.Popen(['cat'], stdin=subprocess.PIPE, stdout=subprocess.PIPE) 
proc.logfilehandle = logfh 

result = proc.communicate("hello there\n") 
print result 

话语记录与源

首先使用StringIO的判别而不是文件，然后子类StringIO覆盖它的写入方法打开，附加时间戳和来源。然后写自定义比较的排序基于时间戳和源，时间戳第一功能，然后源输入，然后输出

with open("file.log","wb") as in logfile: 
out = MyOutPutStringIO.StringIO() 
in = MyInputStringIO.StringIO() 
subprocess.Popen(cmd, shell=True, universal_newlines = True, stdin=in, stdout=out) 

#Then after you are done 
linestotal = [] 
for line in in.readlines(): 
    linestotal.append(line) 
for line in out.readlines(): 
    linestotal.append(line) 

linestotal.sort(customsortbasedontimestampandinput) 

for line in linestotal.readlines(): 
    logwrite.write(line) 

话语测井

with open("file.log","wb") as in logfile: 
subprocess.Popen(cmd, shell=True, universal_newlines = True, stdin=logfile, stdout=logfile) 

相反如下所示

草书记录

with open("stdout.txt","wb") as out: 
with open("stderr.txt","wb") as err: 
with open("stdin.txt","wb") as in: 
subprocess.Popen(cmd, shell=True, universal_newlines = True, stdin=in,stdout=out,stderr=err)