Python子进程让子输出到文件和终端?我正在运行一个脚本,该脚本通过以下方法执行多个可执行文件subprocess.call(cmdArgs,stdout=outf, stderr=errf)什么时候outf/errf为“无”或“文件描述符”(不同的文件用于stdout/stderr).是否有任何方法可以执行每个exe,以便stdout和stderr一起写入文件和终端?
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慕田峪7331174
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call()
Popen(*args, **kwargs).wait()
Popen
stdout=PIPE
p.stdout
:
import sysfrom subprocess import Popen, PIPEfrom threading import Threaddef tee(infile, *files): """Print `infile` to `files` in a separate thread.""" def fanout(infile, *files): for line in iter(infile.readline, ''): for f in files: f.write(line) infile.close() t = Thread(target=fanout, args=(infile,)+files) t.daemon = True t.start() return tdef teed_call(cmd_args, **kwargs): stdout, stderr = [kwargs.pop(s, None) for s in 'stdout', 'stderr'] p = Popen(cmd_args, stdout=PIPE if stdout is not None else None, stderr=PIPE if stderr is not None else None, **kwargs) threads = [] if stdout is not None: threads.append(tee(p.stdout, stdout, sys.stdout)) if stderr is not None: threads.append(tee(p.stderr, stderr, sys.stderr)) for t in threads: t.join() # wait for IO completion return p.wait()outf, errf = open('out.txt', 'w'), open('err.txt', 'w')assert not teed_call(["cat", __file__], stdout=None, stderr=errf)assert not teed_call(["echo", "abc"], stdout=outf, stderr=errf, bufsize=0)assert teed_call(["gcc", "a b"], close_fds=True, stdout=outf, stderr=errf)
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