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what is the difference between popen() and system() in C 46 popen() gives you control over the process's input or output file streams system() doesn't If you don't need to access the process's I O, you can use system() for simplicity system() is in C89 and C99; popen() is Posix only (though the Windows API also has one)
Store output of subprocess. Popen call in a string [duplicate] I'm trying to make a system call in Python and store the output to a string that I can manipulate in the Python program #! usr bin python import subprocess p2 = subprocess Popen("ntpq -p") I've t
Using in subprocess. Popen for command chaining? from subprocess import Popen, PIPE def log_command_outputs(commands): processes = [Popen(cmd, stdout=PIPE) for cmd in commands] outputs = [proc communicate()[0] split() for proc in processes] for output in outputs: for line in output: script_log write(line) script_long write("\n") This starts the commands in parallel, which might make it a little faster than doing them one by one (but probably
Constantly print Subprocess output while process is running 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
Blocking and Non Blocking subprocess calls - Stack Overflow Popen is nonblocking call and check_call are blocking You can make the Popen instance block by calling its wait or communicate method If you look in the source code, you'll see call calls Popen( ) wait(), which is why it is blocking check_call calls call, which is why it blocks as well Strictly speaking, shell=True is orthogonal to the issue of blocking However, shell=True causes