ModuleNotFoundError:没有名为“otree.db”的模块

Question

当我试图在我的项目文件夹的shell中使用‘oTree devserver’命令运行oTree时，我会得到以下错误：

Traceback (most recent call last):
  File "C:\Users\Username\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\site-packages\otree\database.py", line 268, in init_orm
    models = get_models_module(app)
  File "C:\Users\Username\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\site-packages\otree\common.py", line 75, in get_models_module
    return import_module(module_name)
  File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.9_3.9.3312.0_x64__qbz5n2kfra8p0\lib\importlib\__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 1030, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1007, in _find_and_load
  File "<frozen importlib._bootstrap>", line 986, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 680, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 850, in exec_module
  File "<frozen importlib._bootstrap>", line 228, in _call_with_frames_removed
  File "C:\Users\Username\Desktop\oTree\chp1a\models.py", line 6, in <module>
    from otree.db import models
ModuleNotFoundError: No module named 'otree.db'

我使用的是Windows10，oTree版本: 5.8.1。我试图重新安装oTree，但没有成功。我能做什么?

Answer 1

这个问题是在https://groups.google.com/g/otree/c/pyQgYWeSW2Y/m/IV-a0iORAAAJ上交叉提出的。答案是：

“显然在文件chp1a\models.py中”，第6行，您有以下一行：

从otree.db导入模型

那不应该在那里。您的代码应该只从otree.api导入。“

请参阅关于为什么不应该交叉：https://meta.stackexchange.com/questions/141823/is-cross-posting-wrong-to-an-external-site的讨论。