运行Brightway2中LCIA方法元分析Notebook时出现属性错误求助

背景 #

• 正在学习Brightway2，已完成前置Notebook《Getting started with Brightway2》，此前GitHub仓库内所有Notebook运行正常
• 执行《Meta-analysis of LCIA methods》Notebook第[8]行代码时出现问题，该行代码用于执行50000次LCA计算并计时，代码如下：

from time import time
start = time()
lca_scores, methods, activities = get_lots_of_lca_scores()
print(time() - start)

报错情况 #

程序陷入无限循环，重复输出以下错误信息：

Traceback (most recent call last):
  File "/Users/.../miniconda3/envs/bw2_rosetta/lib/python3.9/multiprocessing/process.py", line 315, in _bootstrap
    self.run()
  File "/Users/.../miniconda3/envs/bw2_rosetta/lib/python3.9/multiprocessing/process.py", line 108, in run
    self._target(*self._args, **self._kwargs)
  File "/Users/.../miniconda3/envs/bw2_rosetta/lib/python3.9/multiprocessing/pool.py", line 114, in worker
    task = get()
  File "/Users/.../miniconda3/envs/bw2_rosetta/lib/python3.9/multiprocessing/queues.py", line 368, in get
    return _ForkingPickler.loads(res)
AttributeError: Can't get attribute 'many_activities_one_method' on <module '__main__' (built-in)>

已尝试操作 #

• 检查被调用的many_activities_one_method(activities, method)和get_lots_of_lca_scores()函数，未找到有效解决方法
• 修改代码后问题进一步恶化

疑问 #

• 是否有人成功运行过该Notebook？
• 可能遗漏了哪些配置或步骤？

内容的提问来源于stack exchange，提问作者Mac M Ribo