Hi,
Since today I am suddenly getting a KeyError when I run the below code
model = stan.build(open('model.stan').read(), data)
stan_fit = model.sample(num_chains=4, num_samples=500)
Everything worked fine before. The full error traceback
---------------------------------------------------------------------------
KeyError Traceback (most recent call last)
Cell In[51], line 1
----> 1 model = stan.build(open(
2 'model.stan').read(), data)
3 stan_fit = model.sample(num_chains=4, num_samples=500)
File /Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/stan/model.py:519, in build(program_code, data, random_seed)
516 return Model(model_name, program_code, data, param_names, constrained_param_names, dims, random_seed)
518 try:
--> 519 return asyncio.run(go())
520 except KeyboardInterrupt:
521 return
File /Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/nest_asyncio.py:35, in _patch_asyncio.<locals>.run(main, debug)
33 task = asyncio.ensure_future(main)
34 try:
---> 35 return loop.run_until_complete(task)
36 finally:
37 if not task.done():
File /Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/nest_asyncio.py:90, in _patch_loop.<locals>.run_until_complete(self, future)
87 if not f.done():
88 raise RuntimeError(
89 'Event loop stopped before Future completed.')
---> 90 return f.result()
File /Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/asyncio/futures.py:203, in Future.result(self)
201 self.__log_traceback = False
202 if self._exception is not None:
--> 203 raise self._exception.with_traceback(self._exception_tb)
204 return self._result
File /Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/asyncio/tasks.py:267, in Task.__step(***failed resolving arguments***)
263 try:
264 if exc is None:
265 # We use the `send` method directly, because coroutines
266 # don't have `__iter__` and `__next__` methods.
--> 267 result = coro.send(None)
268 else:
269 result = coro.throw(exc)
File /Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/stan/model.py:511, in build.<locals>.go()
509 resp = await client.post(f"/{model_name}/params", json={"data": data})
510 if resp.status != 200:
--> 511 raise RuntimeError(resp.json()["message"])
512 params_list = resp.json()["params"]
513 assert len({param["name"] for param in params_list}) == len(params_list)
KeyError: 'message'
I am using Python 3.11, Pystan 3.7, asyncio 3.4.3 in a Jupyter Notebook.
Any idea why this is happening suddenly? Thank you