subprocess.Popen.wait()

Popen.wait(timeout=None)

Wait for child process to terminate. Set and return returncode attribute.

If the process does not terminate after timeout seconds, raise a TimeoutExpired exception. It is safe to catch this exception and retry the wait.

Note

This will deadlock when using stdout=PIPE or stderr=PIPE and the child process generates enough output to a pipe such that it blocks waiting for the OS pipe buffer to accept more data. Use Popen.communicate() when using pipes to avoid that.

Note

The function is implemented using a busy loop (non-blocking call and short sleeps). Use the asyncio module for an asynchronous wait: see asyncio.create_subprocess_exec.

Changed in version 3.3: timeout was added.

Deprecated since version 3.4: Do not use the endtime parameter. It is was unintentionally exposed in 3.3 but was left undocumented as it was intended to be private for internal use. Use timeout instead.

Links:

https://docs.python.org/3.5/library/subprocess.html#subprocess.Popen.wait

doc_python

2016-10-07 17:43:37

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