我正在寻找从 python 调用 shell 脚本并使用日志记录将其 stdout 和 stderr 写入文件的方法。这是我的代码：
import logging
import tempfile
import shlex
import os
def run_shell_command(command_line):
command_line_args = shlex.split(command_line)
logging.info('Subprocess: \"' + command_line + '\"')
process_succeeded = True
try:
process_output_filename = tempfile.mktemp(suffix = 'subprocess_tmp_file_')
process_output = open(process_output_filename, 'w')
command_line_process = subprocess.Popen(command_line_args,\
stdout = process_output,\
stderr = process_output)
command_line_process.wait()
process_output.close()
process_output = open(process_output_filename, 'r')
log_subprocess_output(process_output)
process_output.close()
os.remove(process_output_filename)
except:
exception = sys.exc_info()[1]
logging.info('Exception occured: ' + str(exception))
process_succeeded = False
if process_succeeded:
logging.info('Subprocess finished')
else:
logging.info('Subprocess failed')
return process_succeeded
我确信有一种方法可以做到这一点，而无需创建临时文件来存储进程输出。有任何想法吗？
您可以尝试直接传递管道，而不将整个子进程输出缓冲在内存中：
from subprocess import Popen, PIPE, STDOUT
process = Popen(command_line_args, stdout=PIPE, stderr=STDOUT)
with process.stdout:
log_subprocess_output(process.stdout)
exitcode = process.wait() # 0 means success
where log_subprocess_output()可能看起来像：
def log_subprocess_output(pipe):
for line in iter(pipe.readline, b''): # b'\n'-separated lines
logging.info('got line from subprocess: %r', line)
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