I want to call an external program from Python. I have used both Popen() and call() to do that. What’s the difference between the two? My specific goal is to run the following command from Python. I am not sure how redirects work. ./my_script.sh > output I read the documentation and it says that call() … Read more
Is there a way to specify the running directory of command in Python’s subprocess.Popen()? For example: Popen(‘c:\mytool\tool.exe’, workingdir=”d:\test\local”) My Python script is located in C:\programs\python Is is possible to run C:\mytool\tool.exe in the directory D:\test\local? How do I set the working directory for a sub-process? 2 Answers 2
How do I retrieve the exit code when using Python’s subprocess module and the communicate() method? Relevant code: import subprocess as sp data = sp.Popen(openRTSP + opts.split(), stdout=sp.PIPE).communicate()[0] Should I be doing this another way? 8 Answers 8
I’m using a python script as a driver for a hydrodynamics code. When it comes time to run the simulation, I use subprocess.Popen to run the code, collect the output from stdout and stderr into a subprocess.PIPE — then I can print (and save to a log-file) the output information, and check for any errors. … Read more
To launch programs from my Python-scripts, I’m using the following method: def execute(command): process = subprocess.Popen(command, shell=True, stdout=subprocess.PIPE, stderr=subprocess.STDOUT) output = process.communicate()[0] exitCode = process.returncode if (exitCode == 0): return output else: raise ProcessException(command, exitCode, output) So when i launch a process like Process.execute(“mvn clean install”), my program waits until the process is finished, and … Read more
My python script uses subprocess to call a linux utility that is very noisy. I want to store all of the output to a log file and show some of it to the user. I thought the following would work, but the output doesn’t show up in my application until the utility has produced a … Read more
This question already has answers here: Store output of subprocess.Popen call in a string [duplicate] (15 answers) Closed 3 years ago. How can I get the output of a process run using subprocess.call()? Passing a StringIO.StringIO object to stdout gives this error: Traceback (most recent call last): File “<stdin>”, line 1, in <module> File “/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/subprocess.py”, … Read more
If I do the following: import subprocess from cStringIO import StringIO subprocess.Popen([‘grep’,’f’],stdout=subprocess.PIPE,stdin=StringIO(‘one\ntwo\nthree\nfour\nfive\nsix\n’)).communicate()[0] I get: Traceback (most recent call last): File “<stdin>”, line 1, in ? File “/build/toolchain/mac32/python-2.4.3/lib/python2.4/subprocess.py”, line 533, in __init__ (p2cread, p2cwrite, File “/build/toolchain/mac32/python-2.4.3/lib/python2.4/subprocess.py”, line 830, in _get_handles p2cread = stdin.fileno() AttributeError: ‘cStringIO.StringI’ object has no attribute ‘fileno’ Apparently a cStringIO.StringIO object doesn’t quack … Read more
I want to use subprocess.check_output() with ps -A | grep ‘process_name’. I tried various solutions but so far nothing worked. Can someone guide me how to do it? 9 Answers 9
I’m using eSpeak on Ubuntu and have a Python 2.7 script that prints and speaks a message: import subprocess text=”Hello World.” print text subprocess.call([‘espeak’, text]) eSpeak produces the desired sounds, but clutters the shell with some errors (ALSA lib…, no socket connect) so i cannot easily read what was printed earlier. Exit code is 0. … Read more
