[英]How to execute a command using and log its output using logging.info in python
I want to execute a command and then log its output to a log file using logging.info 我想执行一个命令,然后使用logging.info将其输出记录到日志文件中
I am currently using 我目前正在使用
cmd = """var=$(cat ip.txt | head -1 | sed 's/[^|]//g' | awk '{ print length }')"""
logging.info(cmd)
process = os.popen(cmd)
processClose = process.close()
logging.info($var)
but it gives me an error as $ is an invalid syntax. 但是它给我一个错误,因为$是无效的语法。
I want the output in the log file to print the value of the variable (var) 我希望日志文件中的输出打印变量(var)的值
The below method of execution works with logging.info 以下执行方法可与logging.info一起使用
success = sp.call(cmd, stdout=open('temp_log', 'w'), stderr=open('temp_err_log', 'w'), shell = True)
outText = open('temp_log').readlines()
outText = ''.join(outText)
logging.info('Dump stderr:\n%s'%(outText))
$var is invalid in your code. $ var在您的代码中无效。 It is invalid because the process space in which is was created is gone. 这是无效的,因为在其中创建的进程空间已消失。
Try this: 尝试这个:
import subprocess
cmd = "cat ip.txt | head -1 | sed 's/[^|]//g' | awk '{ print length }'"
p = subprocess.Popen([cmd,], stdout=subprocess.PIPE, shell=True)
p.stdout.readline()
Hope this helps. 希望这可以帮助。
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