AttributeError: 'functools.partial' object has no attribute '__module__'

[bravegag]

I'm using the latest release 0.6.2 on Python 3.9.15 but getting the following stacktrace while running the Backtest, any ideas what's wrong?

Traceback (most recent call last):
...
    from backtesting import Strategy
  File "/opt/dev/myvenv/lib/python3.9/site-packages/backtesting/__init__.py", line 68, in <module>
    from . import lib  # noqa: F401
  File "/opt/dev/myvenv/lib/python3.9/site-packages/backtesting/lib.py", line 28, in <module>
    from .backtesting import Backtest, Strategy
  File "/opt/dev/myvenv/lib/python3.9/site-packages/backtesting/backtesting.py", line 1775, in <module>
    __all__ = [getattr(v, '__name__', k)
  File "/opt/dev/myvenv/lib/python3.9/site-packages/backtesting/backtesting.py", line 1777, in <listcomp>
    if ((callable(v) and v.__module__ == __name__ or     # callables from this module
AttributeError: 'functools.partial' object has no attribute '__module__'

[bravegag]

Ok I fixed it by changing the backtesting's backtesting.py and lib.py bottom code to the following (note the new hasattr before just assuming there is a __module__ attribute):

# NOTE: Don't put anything below this __all__ list
__all__ = [getattr(v, '__name__', k)
           for k, v in globals().items()                                                    # export
           if ((callable(v) and (hasattr(v, '__module__') and v.__module__ == __name__) or  # callables from this module
                k.isupper()) and                                                            # or CONSTANTS
               not getattr(v, '__name__', k).startswith('_'))]                              # neither marked internal

# NOTE: Don't put anything below here. See above.

@kernc should I PR this?

[Limfocit]

@bravegag had the same issue, created a PR

[kernc]

Fixed in master and should be released in a day or two.

May I ask what prevents any of you from upgrading from Python 3.9 to a later version? Its EOL is closing in.

[Limfocit]

I have 3.10.11 version

[bravegag]

Fixed in master and should be released in a day or two.

May I ask what prevents any of you from upgrading from Python 3.9 to a later version? Its EOL is closing in.

I just picked a version a long time ago and stuck to it, now upgrading everything to Python 3.12 (stable) and Miniconda 25.1.

I look forward getting profitable backtests :)