Because all asyncio subprocess functions are asynchronous and asyncio provides many tools to work with such functions, it is easy to execute and monitor multiple subprocesses in parallel.
Older high-level API Replacing Older Functions with the subprocess Module Replacing /bin/sh shell command substitution Replacing shell pipeline Replacing os.system() Replacing the os.spawn family Replacing os.popen() Legacy Shell Invocation Functions Notes Timeout Behavior Converting an argument sequence to a string on Windows Disable use of ...
Subprocesses are not supported, i.e. loop.subprocess_exec() and loop.subprocess_shell() methods are not implemented. ProactorEventLoop has the following limitations:
The subprocess module now uses the posix_spawn() function in more situations, including when close_fds is True (the default) on many modern platforms. This should provide a notable performance increase when launching processes on FreeBSD and Solaris.
By default, IDLE executes user code in a separate subprocess via a socket, which uses the internal loopback interface. This connection is not externally visible and no data is sent to or received from the internet.
Executing commands quoted by this module on such shells can open up the possibility of a command injection vulnerability. Consider using functions that pass command arguments with lists such as subprocess.run() with shell=False. This idiom would be unsafe:
ssl: SSL/TLS security considerations subprocess: Subprocess security considerations tempfile: mktemp is deprecated due to vulnerability to race conditions xml: XML security zipfile: maliciously prepared .zip files can cause disk volume exhaustion The -I command line option can be used to run Python in isolated mode.
Source code: Lib/pty.py The pty module defines operations for handling the pseudo-terminal concept: starting another process and being able to write to and read from its controlling terminal progra...
