7611d4c3b3
- looks like around python3.9, they changed it so that
if we don't block on the main thread, it starts to shut things down
- polling thread.join() makes Ctrl+C work. kind of.
```
$ ./electrum/scripts/txradar.py 6bde84a981e72573666fcc51c81ec3f8f4a813709bf16451dce3f106a114d392
Exception in run: RuntimeError('cannot schedule new futures after interpreter shutdown')
Traceback (most recent call last):
File "/home/user/wspace/electrum/electrum/util.py", line 1218, in wrapper
return await func(*args, **kwargs)
File "/home/user/wspace/electrum/electrum/interface.py", line 649, in wrapper_func
return await func(self, *args, **kwargs)
File "/home/user/wspace/electrum/electrum/interface.py", line 675, in run
await self.open_session(ssl_context=ssl_context)
File "/home/user/wspace/electrum/electrum/interface.py", line 872, in open_session
async with _RSClient(
File "/home/user/.local/lib/python3.10/site-packages/aiorpcx/rawsocket.py", line 167, in __aenter__
_transport, protocol = await self.create_connection()
File "/home/user/wspace/electrum/electrum/interface.py", line 285, in create_connection
return await super().create_connection()
File "/home/user/.local/lib/python3.10/site-packages/aiorpcx/rawsocket.py", line 163, in create_connection
return await connector.create_connection(
File "/usr/lib/python3.10/asyncio/base_events.py", line 1036, in create_connection
infos = await self._ensure_resolved(
File "/usr/lib/python3.10/asyncio/base_events.py", line 1418, in _ensure_resolved
return await loop.getaddrinfo(host, port, family=family, type=type,
File "/usr/lib/python3.10/asyncio/base_events.py", line 863, in getaddrinfo
return await self.run_in_executor(
File "/usr/lib/python3.10/asyncio/base_events.py", line 821, in run_in_executor
executor.submit(func, *args), loop=self)
File "/usr/lib/python3.10/concurrent/futures/thread.py", line 169, in submit
raise RuntimeError('cannot schedule new futures after '
RuntimeError: cannot schedule new futures after interpreter shutdown
```
41 lines
1.1 KiB
Python
Executable File
41 lines
1.1 KiB
Python
Executable File
#!/usr/bin/env python3
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# A simple script that connects to a server and displays block headers
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import time
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import asyncio
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from electrum.network import Network
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from electrum.util import print_msg, json_encode, create_and_start_event_loop, log_exceptions
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from electrum.simple_config import SimpleConfig
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config = SimpleConfig()
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# start network
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loop, stopping_fut, loop_thread = create_and_start_event_loop()
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network = Network(config)
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network.start()
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# wait until connected
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while not network.is_connected():
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time.sleep(1)
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print_msg("waiting for network to get connected...")
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header_queue = asyncio.Queue()
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@log_exceptions
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async def f():
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try:
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await network.interface.session.subscribe('blockchain.headers.subscribe', [], header_queue)
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# 3. wait for results
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while network.is_connected():
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header = await header_queue.get()
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print_msg(json_encode(header))
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finally:
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stopping_fut.set_result(1)
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# 2. send the subscription
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asyncio.run_coroutine_threadsafe(f(), loop)
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while loop_thread.is_alive():
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loop_thread.join(1)
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