ModuleNotFoundError: No module named '__main__'

[gavin-aguiar]

Announcement

We have identified an issue with a subset of python functions apps which have imported libraries like python-dotenv are seeing an error with functions runtime 4.9.1 and above.

The function apps are failing with the following error:

`Microsoft.Azure.WebJobs.Host.FunctionInvocationException : 
Exception while executing function: Functions.HttpTrigger ---> Microsoft.Azure.WebJobs.Script.Workers.Rpc.RpcException : 
Result: Failure Exception: ModuleNotFoundError: No module named '__main__' 
Stack: 
File '/azure-functions-host/workers/python/3.9/LINUX/X64/azure_functions_worker/dispatcher.py', line 448, in _handle__invocation_request call_result = await self._loop.run_in_executor( 
File '/usr/local/lib/python3.9/concurrent/futures/thread.py', line 58, in run result = self.fn(*self.args, **self.kwargs) 
File '/azure-functions-host/workers/python/3.9/LINUX/X64/azure_functions_worker/dispatcher.py', line 691, in _run_sync_func return ExtensionManager.get_sync_invocation_wrapper(context, 
File '/azure-functions-host/workers/python/3.9/LINUX/X64/azure_functions_worker/extension.py', line 215, in _raw_invocation_wrapper result = function(**args) 
File '/home/site/wwwroot/HttpTrigger/__init__.py', line 8, in main return func.HttpResponse(f'Dotenv: {load_dotenv(find_dotenv())}') 
File '/home/site/wwwroot/.python_packages/lib/site-packages/dotenv/main.py', line 284, in find_dotenv if usecwd or _is_interactive() or getattr(sys, 'frozen', False): 
File '/home/site/wwwroot/.python_packages/lib/site-packages/dotenv/main.py', line 281, in _is_interactive main = __import__('__main__', None, None, fromlist=['__file__']) `

Mitigation

Add the app setting PYTHON_ISOLATE_WORKER_DEPENDENCIES to 0 as described in the documentation here

Fix

The fix is being rolled out and will be available in runtime versions 1.10.2 and higher.

[af-jka]

Same issue here since about 3 weeks.

[waltherg]

Still seeing this and really holding us back here on runtime version 4.14.0.0.

[drewsilcock]

I am still seeing this on uk-south premium plan. Combined with #1050 this issue blocks use of Tensorflow and Dill on Azure Functions.

[gavin-aguiar]

I am still seeing this on uk-south premium plan. Combined with #1050 this issue blocks use of Tensorflow and Dill on Azure Functions.

@drewsilcock Have you enabled PYTHON_ISOLATE_WORKER_DEPENDENCIES in your app settings? Also, could you share your requirements.txt?

[drewsilcock]

I am still seeing this on uk-south premium plan. Combined with #1050 this issue blocks use of Tensorflow and Dill on Azure Functions.

@drewsilcock Have you enabled PYTHON_ISOLATE_WORKER_DEPENDENCIES in your app settings? Also, could you share your requirements.txt?

I have PYTHON_ISOLATE_WORKER_DEPENDENCIES set to 1 as a necessary step to fixing issues #1217 and #1050.

I can since figured out a hacky workaround for this issue that doesn't require setting PYTHON_ISOLATE_WORKER_DEPENDENCIES to 0, which is simply to create the file __main__.py in the folder of my function and then put

import os
import path
sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__))))

at the top of the __init__.py for the function - this unblocks me from being able to use these libraries, but obviously isn't an ideal solution.

For reference, requirements.txt:

absl-py==1.4.0 ; python_version >= "3.9" and python_version < "3.10"
aiohttp==3.8.4 ; python_version >= "3.9" and python_version < "3.10"
aiosignal==1.3.1 ; python_version >= "3.9" and python_version < "3.10"
alembic==1.10.4 ; python_version >= "3.9" and python_version < "3.10"
astunparse==1.6.3 ; python_version >= "3.9" and python_version < "3.10"
async-cache==1.1.1 ; python_version >= "3.9" and python_version < "3.10"
async-timeout==4.0.2 ; python_version >= "3.9" and python_version < "3.10"
attrs==23.1.0 ; python_version >= "3.9" and python_version < "3.10"
azure-core==1.26.4 ; python_version >= "3.9" and python_version < "3.10"
azure-cosmos==4.3.1 ; python_version >= "3.9" and python_version < "3.10"
azure-eventhub==5.11.2 ; python_version >= "3.9" and python_version < "3.10"
azure-functions==1.13.3 ; python_version >= "3.9" and python_version < "3.10"
azure-storage-blob==12.16.0 ; python_version >= "3.9" and python_version < "3.10"
binaryornot==0.4.4 ; python_version >= "3.9" and python_version < "3.10"
cachetools==5.3.0 ; python_version >= "3.9" and python_version < "3.10"
certifi==2022.12.7 ; python_version >= "3.9" and python_version < "3.10"
cffi==1.15.1 ; python_version >= "3.9" and python_version < "3.10"
chardet==5.1.0 ; python_version >= "3.9" and python_version < "3.10"
charset-normalizer==3.1.0 ; python_version >= "3.9" and python_version < "3.10"
click==8.1.3 ; python_version >= "3.9" and python_version < "3.10"
cloudpickle==2.2.1 ; python_version >= "3.9" and python_version < "3.10"
colorama==0.4.6 ; python_version >= "3.9" and python_version < "3.10" and platform_system == "Windows"
comtrade==0.0.10 ; python_version >= "3.9" and python_version < "3.10"
contourpy==1.0.7 ; python_version >= "3.9" and python_version < "3.10"
cryptography==40.0.2 ; python_version >= "3.9" and python_version < "3.10"
cycler==0.11.0 ; python_version >= "3.9" and python_version < "3.10"
databricks-cli==0.17.6 ; python_version >= "3.9" and python_version < "3.10"
decorator==5.1.1 ; python_version >= "3.9" and python_version < "3.10"
dill==0.3.4 ; python_version >= "3.9" and python_version < "3.10"
dm-tree==0.1.8 ; python_version >= "3.9" and python_version < "3.10"
docker==6.0.1 ; python_version >= "3.9" and python_version < "3.10"
entrypoints==0.4 ; python_version >= "3.9" and python_version < "3.10"
flask==2.2.3 ; python_version >= "3.9" and python_version < "3.10"
flatbuffers==23.3.3 ; python_version >= "3.9" and python_version < "3.10"
fonttools==4.39.3 ; python_version >= "3.9" and python_version < "3.10"
frozenlist==1.3.3 ; python_version >= "3.9" and python_version < "3.10"
gast==0.4.0 ; python_version >= "3.9" and python_version < "3.10"
gitdb==4.0.10 ; python_version >= "3.9" and python_version < "3.10"
gitpython==3.1.31 ; python_version >= "3.9" and python_version < "3.10"
google-auth-oauthlib==1.0.0 ; python_version >= "3.9" and python_version < "3.10"
google-auth==2.17.3 ; python_version >= "3.9" and python_version < "3.10"
google-pasta==0.2.0 ; python_version >= "3.9" and python_version < "3.10"
greenlet==2.0.2 ; python_version >= "3.9" and platform_machine == "aarch64" and python_version < "3.10" or python_version >= "3.9" and platform_machine == "ppc64le" and python_version < "3.10" or python_version >= "3.9" and platform_machine == "x86_64" and python_version < "3.10" or python_version >= "3.9" and platform_machine == "amd64" and python_version < "3.10" or python_version >= "3.9" and platform_machine == "AMD64" and python_version < "3.10" or python_version >= "3.9" and platform_machine == "win32" and python_version < "3.10" or python_version >= "3.9" and platform_machine == "WIN32" and python_version < "3.10"
grpcio==1.54.0 ; python_version >= "3.9" and python_version < "3.10"
gunicorn==20.1.0 ; python_version >= "3.9" and python_version < "3.10" and platform_system != "Windows"
h5py==3.8.0 ; python_version >= "3.9" and python_version < "3.10"
idna==3.4 ; python_version >= "3.9" and python_version < "3.10"
importlib-metadata==5.2.0 ; python_version >= "3.9" and python_version < "3.10"
importlib-resources==5.12.0 ; python_version >= "3.9" and python_version < "3.10"
isodate==0.6.1 ; python_version >= "3.9" and python_version < "3.10"
itsdangerous==2.1.2 ; python_version >= "3.9" and python_version < "3.10"
jax==0.4.8 ; python_version >= "3.9" and python_version < "3.10"
jinja2==3.1.2 ; python_version >= "3.9" and python_version < "3.10"
joblib==1.2.0 ; python_version >= "3.9" and python_version < "3.10"
keras==2.12.0 ; python_version >= "3.9" and python_version < "3.10"
kiwisolver==1.4.4 ; python_version >= "3.9" and python_version < "3.10"
libclang==16.0.0 ; python_version >= "3.9" and python_version < "3.10"
mako==1.2.4 ; python_version >= "3.9" and python_version < "3.10"
markdown==3.4.3 ; python_version >= "3.9" and python_version < "3.10"
markupsafe==2.1.2 ; python_version >= "3.9" and python_version < "3.10"
matplotlib==3.7.1 ; python_version >= "3.9" and python_version < "3.10"
ml-dtypes==0.1.0 ; python_version >= "3.9" and python_version < "3.10"
mlflow==1.30.1 ; python_version >= "3.9" and python_version < "3.10"
multidict==6.0.4 ; python_version >= "3.9" and python_version < "3.10"
numpy==1.23.5 ; python_version >= "3.9" and python_version < "3.10"
oauthlib==3.2.2 ; python_version >= "3.9" and python_version < "3.10"
opt-einsum==3.3.0 ; python_version >= "3.9" and python_version < "3.10"
packaging==21.3 ; python_version >= "3.9" and python_version < "3.10"
pandas==1.5.3 ; python_version >= "3.9" and python_version < "3.10"
pillow==9.5.0 ; python_version >= "3.9" and python_version < "3.10"
plotly==5.14.1 ; python_version >= "3.9" and python_version < "3.10"
prometheus-client==0.16.0 ; python_version >= "3.9" and python_version < "3.10"
prometheus-flask-exporter==0.22.3 ; python_version >= "3.9" and python_version < "3.10"
protobuf==4.22.3 ; python_version >= "3.9" and python_version < "3.10"
psycopg-binary==3.1.8 ; python_version >= "3.9" and python_version < "3.10"
psycopg-c==3.1.8 ; python_version >= "3.9" and python_version < "3.10"
psycopg-pool==3.1.7 ; python_version >= "3.9" and python_version < "3.10"
psycopg[c,pool]==3.1.8 ; python_version >= "3.9" and python_version < "3.10"
pyasn1-modules==0.3.0 ; python_version >= "3.9" and python_version < "3.10"
pyasn1==0.5.0 ; python_version >= "3.9" and python_version < "3.10"
pycparser==2.21 ; python_version >= "3.9" and python_version < "3.10"
pydantic==1.10.7 ; python_version >= "3.9" and python_version < "3.10"
pydantic[dotenv]==1.10.7 ; python_version >= "3.9" and python_version < "3.10"
pyjwt==2.6.0 ; python_version >= "3.9" and python_version < "3.10"
pyparsing==3.0.9 ; python_version >= "3.9" and python_version < "3.10"
python-dateutil==2.8.2 ; python_version >= "3.9" and python_version < "3.10"
python-dotenv==1.0.0 ; python_version >= "3.9" and python_version < "3.10"
pytz==2022.7.1 ; python_version >= "3.9" and python_version < "3.10"
pywin32==306 ; python_version >= "3.9" and python_version < "3.10" and sys_platform == "win32"
pyyaml==6.0 ; python_version >= "3.9" and python_version < "3.10"
querystring-parser==1.2.4 ; python_version >= "3.9" and python_version < "3.10"
redis==4.5.4 ; python_version >= "3.9" and python_version < "3.10"
requests-oauthlib==1.3.1 ; python_version >= "3.9" and python_version < "3.10"
requests==2.28.2 ; python_version >= "3.9" and python_version < "3.10"
rsa==4.9 ; python_version >= "3.9" and python_version < "3.10"
scikit-learn==1.0.2 ; python_version >= "3.9" and python_version < "3.10"
scipy==1.10.1 ; python_version >= "3.9" and python_version < "3.10"
setuptools==67.7.2 ; python_version >= "3.9" and python_version < "3.10"
six==1.16.0 ; python_version >= "3.9" and python_version < "3.10"
smmap==5.0.0 ; python_version >= "3.9" and python_version < "3.10"
sqlalchemy==1.4.47 ; python_version >= "3.9" and python_version < "3.10"
sqlparse==0.4.4 ; python_version >= "3.9" and python_version < "3.10"
tabulate==0.9.0 ; python_version >= "3.9" and python_version < "3.10"
tenacity==8.2.2 ; python_version >= "3.9" and python_version < "3.10"
tensorboard-data-server==0.7.0 ; python_version >= "3.9" and python_version < "3.10"
tensorboard-plugin-wit==1.8.1 ; python_version >= "3.9" and python_version < "3.10"
tensorboard==2.12.2 ; python_version >= "3.9" and python_version < "3.10"
tensorflow-estimator==2.12.0 ; python_version >= "3.9" and python_version < "3.10"
tensorflow-io-gcs-filesystem==0.32.0 ; python_version >= "3.9" and python_version < "3.10" and platform_machine != "arm64" or python_version >= "3.9" and python_version < "3.10" and platform_system != "Darwin"
tensorflow-probability==0.18.0 ; python_version >= "3.9" and python_version < "3.10"
tensorflow==2.12.0 ; python_version >= "3.9" and python_version < "3.10"
termcolor==2.3.0 ; python_version >= "3.9" and python_version < "3.10"
threadpoolctl==3.1.0 ; python_version >= "3.9" and python_version < "3.10"
tqdm==4.65.0 ; python_version >= "3.9" and python_version < "3.10"
typing-extensions==4.5.0 ; python_version >= "3.9" and python_version < "3.10"
tzdata==2023.3 ; python_version >= "3.9" and python_version < "3.10" and sys_platform == "win32"
urllib3==1.26.15 ; python_version >= "3.9" and python_version < "3.10"
waitress==2.1.2 ; python_version >= "3.9" and python_version < "3.10" and platform_system == "Windows"
websocket-client==1.5.1 ; python_version >= "3.9" and python_version < "3.10"
werkzeug==2.2.3 ; python_version >= "3.9" and python_version < "3.10"
wheel==0.40.0 ; python_version >= "3.9" and python_version < "3.10"
wrapt==1.14.1 ; python_version >= "3.9" and python_version < "3.10"
xarray==0.21.1 ; python_version >= "3.9" and python_version < "3.10"
yarl==1.9.1 ; python_version >= "3.9" and python_version < "3.10"
zipp==3.15.0 ; python_version >= "3.9" and python_version < "3.10"