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Remove autograd code for Python < 3.9 (#163313)

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As PyTorch is moving to Python 3.10, it is safe to remove code for Python < 3.9.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/163313
Approved by: https://github.com/ezyang
This commit is contained in:
Yuanyuan Chen 2025-09-21 15:35:03 +00:00 committed by PyTorch MergeBot
parent f34744d2a5
commit 51152efa67
1 changed files with 0 additions and 10 deletions
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10
torch/csrc/autograd/python_engine.cpp
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@ -57,10 +57,6 @@ PythonEngine::~PythonEngine() {
Engine::stop();
}
#if PY_MAJOR_VERSION == 3 && PY_MINOR_VERSION >= 9
#define IS_PYTHON_3_9_PLUS
#endif
void PythonEngine::thread_init(
int device,
const std::shared_ptr<ReadyQueue>& ready_queue,
@ -72,11 +68,7 @@ void PythonEngine::thread_init(
// Create a PyThreadState, but release the GIL. This lets
// pybind11::gil_scoped_acquire calls inside thread_main acquire the GIL
// without having to create a new PyThreadState each time.
#if defined(IS_PYTHON_3_9_PLUS)
auto gil = std::make_unique<pybind11::gil_scoped_acquire>();
#else
pybind11::gil_scoped_acquire gil;
#endif
pybind11::gil_scoped_release no_gil;
Engine::thread_init(device, ready_queue, false);
@ -85,7 +77,6 @@ void PythonEngine::thread_init(
decrement_non_reentrant_thread_count();
}
#if defined(IS_PYTHON_3_9_PLUS)
// Do not call PyEval_RestoreThread, PyThreadState_[Clear|DeleteCurrent] if
// runtime is finalizing
if (!Py_IsInitialized()) {
@ -96,7 +87,6 @@ void PythonEngine::thread_init(
auto ptr = gil.release();
operator delete(ptr);
}
#endif
}
void PythonEngine::thread_on_exception(