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InProcessKernelClient: Do not use run_sync if already in a running loop #1106

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InProcessKernelClient: Do not use run_sync if already in a running loop #1106

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InProcessKernelClient: Do not use run_sync if already in a running loop
frmdstryr Mar 25, 2023
e733065
[pre-commit.ci] auto fixes from pre-commit.com hooks
pre-commit-ci[bot] Mar 25, 2023
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9 changes: 8 additions & 1 deletion ipykernel/inprocess/client.py
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Original file line number Diff line number Diff line change
Expand Up @@ -28,6 +28,13 @@
# -----------------------------------------------------------------------------


def in_running_loop() -> bool:
try:
return asyncio.get_running_loop() is not None
except RuntimeError:
return False


class InProcessKernelClient(KernelClient):
"""A client for an in-process kernel.

Expand Down Expand Up @@ -189,7 +196,7 @@ def _dispatch_to_kernel(self, msg):
stream = kernel.shell_stream
self.session.send(stream, msg)
msg_parts = stream.recv_multipart()
if run_sync is not None:
if not in_running_loop() and run_sync is not None:
dispatch_shell = run_sync(kernel.dispatch_shell)
dispatch_shell(msg_parts)
else:
Expand Down