Unable to Run quickstart Strategy Code

[iguy0]

Describe the bug After installing LiuAlgoTrader via git, configuring environment variables and attempting to run the quickstart strategy I'm greeted with: AttributeError: module 'main' has no attribute 'spec'

To Reproduce Steps to reproduce the behavior:

1. Install Ubuntu 22.04 Server $ python3 --version -> Python 3.10.4 python3 -m pip install virtualenv git clone https://github.com/amor71/LiuAlgoTrader.git cd LiuAlgoTrader -> Configure env variables source .venv/bin/activate python3 setup.py install -> Go to examples/quickstart $ trader

(.venv) v2@ubuntu:~/LiuAlgoTrader/examples/quickstart$ trader
[motd()][3016]2022-09-05 13:06:33.862920:++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
[motd()][3016]2022-09-05 13:06:33.862987:++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
[motd()][3016]2022-09-05 13:06:33.863006:trader v0.4.29 starting
[motd()][3016]2022-09-05 13:06:33.863043:unique id: 74cdcf81-1d99-4140-ae46-88d44da1b59f
[motd()][3016]2022-09-05 13:06:33.863067:----------------------------------------------------------
[motd()][3016]2022-09-05 13:06:33.863091:----------------------------------------------------------
{'events': ['second', 'minute', 'trade', 'quote'], 'scanners': {'momentum': {'provider': 'alpaca', 'min_volume': 30000, 'min_gap': 3.5, 'min_last_dv': 500000, 'max_share_price': 20.0, 'min_share_price': 2.0, 'from_market_open': 15, 'recurrence': 5}}, 'strategies': {'MomentumLongV3': {'filename': './momentum_long_simplified.py', 'schedule': [{'duration': 60, 'start': 15}]}}}
[<module>()][3016]2022-09-05 13:06:33.864189:loaded configuration file from ./tradeplan.toml
[calc_num_consumer_processes()][3016]2022-09-05 13:06:38.870648:Total CPU Load:0.0, num_cpu:8
[<module>()][3016]2022-09-05 13:06:38.870722:Starting 40 consumer processes
Traceback (most recent call last):
  File "/home/v2/LiuAlgoTrader/.venv/bin/trader", line 4, in <module>
    __import__('pkg_resources').run_script('liualgotrader==0.4.29', 'trader')
  File "/home/v2/LiuAlgoTrader/.venv/lib/python3.10/site-packages/pkg_resources/__init__.py", line 672, in run_script
    self.require(requires)[0].run_script(script_name, ns)
  File "/home/v2/LiuAlgoTrader/.venv/lib/python3.10/site-packages/pkg_resources/__init__.py", line 1479, in run_script
    exec(script_code, namespace, namespace)
  File "/home/v2/LiuAlgoTrader/.venv/lib/python3.10/site-packages/liualgotrader-0.4.29-py3.10.egg/EGG-INFO/scripts/trader", line 89, in <module>
  File "/usr/lib/python3.10/multiprocessing/process.py", line 121, in start
    self._popen = self._Popen(self)
  File "/usr/lib/python3.10/multiprocessing/context.py", line 224, in _Popen
    return _default_context.get_context().Process._Popen(process_obj)
  File "/usr/lib/python3.10/multiprocessing/context.py", line 284, in _Popen
    return Popen(process_obj)
  File "/usr/lib/python3.10/multiprocessing/popen_spawn_posix.py", line 32, in __init__
    super().__init__(process_obj)
  File "/usr/lib/python3.10/multiprocessing/popen_fork.py", line 19, in __init__
    self._launch(process_obj)
  File "/usr/lib/python3.10/multiprocessing/popen_spawn_posix.py", line 42, in _launch
    prep_data = spawn.get_preparation_data(process_obj._name)
  File "/usr/lib/python3.10/multiprocessing/spawn.py", line 183, in get_preparation_data
    main_mod_name = getattr(main_module.__spec__, "name", None)
AttributeError: module '__main__' has no attribute '__spec__'

Expected behavior The trader command would successfully launch the quickstart strategy.

Desktop (please complete the following information):

• OS: $ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 22.04.1 LTS Release: 22.04 Codename: jammy

Additional info:

`$ pip list <- From venv Package Version

---

aiohttp 3.8.1 aiosignal 1.2.0 alpaca-trade-api 2.3.0 altair 4.2.0 async-timeout 4.0.2 asyncpg 0.26.0 attrs 22.1.0 blinker 1.5 cachetools 5.2.0 certifi 2022.6.15 cffi 1.15.1 charset-normalizer 2.1.1 click 8.1.3 commonmark 0.9.1 cycler 0.11.0 decorator 5.1.1 Deprecated 1.2.13 deprecation 2.1.0 empyrical 0.5.5 entrypoints 0.4 exchange-calendars 4.2 finnhub-python 2.4.13 fire 0.4.0 fonttools 4.37.1 frozenlist 1.3.1 gitdb 4.0.9 GitPython 3.1.27 idna 3.3 importlib-metadata 4.12.0 iso8601 1.0.2 Jinja2 3.1.2 jsonschema 4.15.0 kiwisolver 1.4.4 korean-lunar-calendar 0.2.1 liualgotrader 0.4.29 lxml 4.9.1 MarkupSafe 2.1.1 matplotlib 3.5.2 msgpack 1.0.3 multidict 6.0.2 multitasking 0.0.11 nest-asyncio 1.5.5 numpy 1.23.1 packaging 21.3 pandas 1.5.0rc0 pandas-datareader 0.10.0 pandas-market-calendars 3.5 parsedatetime 2.6 Pillow 9.2.0 pip 22.2.2 polygon-api-client 1.1.1 protobuf 3.20.1 psutil 5.9.1 pyarrow 9.0.0 pycparser 2.21 pydeck 0.8.0b1 pygit2 1.9.2 Pygments 2.13.0 pyluach 2.0.1 Pympler 1.0.1 pyparsing 3.0.9 pyrsistent 0.18.1 python-dateutil 2.8.2 pytz 2022.2.1 pytz-deprecation-shim 0.1.0.post0 PyYAML 6.0 QuantStats 0.0.59 requests 2.28.1 rich 12.5.1 scipy 1.9.0 seaborn 0.12.0rc0 semver 3.0.0.dev3 setuptools 65.3.0 six 1.16.0 smmap 5.0.0 stockstats 0.4.1 streamlit 1.11.1 tabulate 0.8.10 termcolor 1.1.0 toml 0.10.2 toolz 0.12.0 tornado 6.2 tqdm 4.64.0 typing_extensions 4.3.0 tzdata 2022.2 tzlocal 4.2 urllib3 1.26.11 validators 0.20.0 watchdog 2.1.9 websocket-client 1.4.1 websockets 10.3 wheel 0.37.1 wrapt 1.14.1 yarl 1.8.1 yfinance 0.1.74 zipp 3.8.1 `

I appreciate all the help.

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[amor71]

@iguy0 I'm unable to reproduce the issue. It looks like your setup fails to SPAWN a consumer process. However, I am a bit confused with the order of the things you're trying to do. Do you have a database setup? Did you run liu quickstart before trying to run trader?

[iguy0]

You are correct! I had configured it incorrectly. I've redeployed the stack using Ubuntu 20.04 and installed following the instructions from here: https://liualgotrader.readthedocs.io/en/latest/Troubleshooting.html

I appreciate all your effort on this project. Congrats on the excellent solution!