subprocess - Python script, log to screen and to file -
i have script, , want put output on screen , log file. can me on how this?
ps: don't mind debug lines plz
thx
#!/usr/bin/python import os import subprocess import sys import argparse subprocess import popen, pipe, call parser = argparse.argumentparser() parser.add_argument('-u', '--url', help=' add here url want use. example: www.google.com') parser.add_argument('-o', '--output', help=' add here output file logging') args = parser.parse_args() print args.url print args.output cmd1 = ("ping -c 4 "+args.url) cmd2 = cmd1, args.url print cmd2 print cmd1 p = subprocess.popen(cmd2, shell=true, stderr=subprocess.pipe)
you can use logging module , communicate() method of subprocess process:
import logging import argparse import subprocess def initlogging( args ): formatstring = '[%(levelname)s][%(asctime)s] : %(message)s' # specify format string loglevel = logging.info # specify standard log level logging.basicconfig( format=formatstring , level=loglevel, datefmt='%y-%m-%d %i:%m:%s') log_file = args.output filehandler = logging.filehandler( log_file ) logging.root.addhandler( filehandler ) # add file handler logging parser = argparse.argumentparser() parser.add_argument('-u', '--url', help=' add here url want use. example: www.google.com') parser.add_argument('-o', '--output', help=' add here output file logging') args = parser.parse_args() initlogging( args ) cmd = [ "ping" , "-c" ,"4", args.url ] p = subprocess.popen( cmd, stdout=subprocess.pipe, stderr=subprocess.pipe ) stdout_string , stderr_string = p.communicate() # receive stdout, stderr, take care, blocking call, # stdout_string or stderr_string of type none logging.info( stderr_string ) logging.info( stdout_string ) this log stdout , file.
you can add more handlers e.g. stream handlers
logging.addhandler( logging.streamhandler( somestreamlikeobject ) ) one other thing: should never use shell=true unless necessary because unsafe , brings technical conditions (see subprocess documentation). above code altered in way not use shell=true.
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