Python 3.14+concurrent.interpretersexception

concurrent.interpreters.InterpreterNotFoundError

exceptions

The targeted interpreter no longer exists — closed or an unknown id (Python 3.14+); a subclass of InterpreterError.

Syntax

raise concurrent.interpreters.InterpreterNotFoundError

The usual cause is holding on to an Interpreter object after close(), or addressing an id that nothing owns any more; any exec() or call() through such a handle fails with this exception. Retrying is pointless — the interpreter is gone for good, so create a fresh one. If you handle it alongside other errors, put this except clause above InterpreterError, or the base class will swallow it first.

Examples

from concurrent import interpreters  # Python 3.14+
print(issubclass(interpreters.InterpreterNotFoundError, interpreters.InterpreterError))  # → True
interp = interpreters.create()
interp.exec('x = 1')
interp.close()
try:
    interp.exec('x = 2')  # интерпретатор уже уничтожен
except interpreters.InterpreterNotFoundError as e:
    print(type(e).__name__)  # → InterpreterNotFoundError
try:
    interpreters.Interpreter(999999)  # такого id не существует
except interpreters.InterpreterNotFoundError:
    print('нет такого интерпретатора')  # → нет такого интерпретатора

See also

Open in the full glossarydocs.python.orgReport an inaccuracy