Python 3.3+Exceptionsexception

ChildProcessError

built-in exceptions

An operation on a child process failed (a subclass of OSError).

Syntax

raise ChildProcessError

It surfaces from the ECHILD errno: os.wait() or os.waitpid() was called when no child process was left, or its status had already been collected. Code built on subprocess rarely sees it, because Popen tracks the child's exit status itself — so when it does appear, something is usually waiting on the same child twice or from two different places.

Examples

try:
    raise ChildProcessError
except ChildProcessError as e:
    print(type(e).__name__)   # → ChildProcessError

See also

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