将 Sacred Module 与 iPython 一起使用

Question

我正在尝试设置 sacred for Python and I am going through the tutorial。我能够使用 pip install sacred 毫无问题地设置神圣。我遇到问题运行基本代码：

from sacred import Experiment

ex = Experiment("hello_world")

运行这段代码returns一个ValueError:

---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
<ipython-input-25-66f549cfb192> in <module>()
      1 from sacred import Experiment
      2 
----> 3 ex = Experiment("hello_world")

/Users/ryandevera/anaconda/lib/python2.7/site-packages/sacred/experiment.pyc in __init__(self, name, ingredients)
     42         super(Experiment, self).__init__(path=name,
     43                                          ingredients=ingredients,
---> 44                                          _caller_globals=caller_globals)
     45         self.default_command = ""
     46         self.command(print_config, unobserved=True)

/Users/ryandevera/anaconda/lib/python2.7/site-packages/sacred/ingredient.pyc in __init__(self, path, ingredients, _caller_globals)
     48         self.doc = _caller_globals.get('__doc__', "")
     49         self.sources, self.dependencies = \
---> 50             gather_sources_and_dependencies(_caller_globals)
     51 
     52     # =========================== Decorators ==================================

/Users/ryandevera/anaconda/lib/python2.7/site-packages/sacred/dependencies.pyc in gather_sources_and_dependencies(globs)
    204 def gather_sources_and_dependencies(globs):
    205     dependencies = set()
--> 206     main = Source.create(globs.get('__file__'))
    207     sources = {main}
    208     experiment_path = os.path.dirname(main.filename)

/Users/ryandevera/anaconda/lib/python2.7/site-packages/sacred/dependencies.pyc in create(filename)
     61         if not filename or not os.path.exists(filename):
     62             raise ValueError('invalid filename or file not found "{}"'
---> 63                              .format(filename))
     64 
     65         mainfile = get_py_file_if_possible(os.path.abspath(filename))

ValueError: invalid filename or file not found "None"

我不确定为什么会返回此错误。该文档没有说明在运行代码之前设置实验文件。任何帮助将不胜感激！

Answer 1

给出的回溯表明 Experiment 的构造函数搜索其命名空间以查找其定义的文件。

因此，要使示例正常运行，请将示例代码放入一个文件中，然后直接运行该文件。

如果您正在使用 ipython，那么您总是可以尝试使用 %%python 命令，这将在运行之前有效地将您提供的代码捕获到文件中（在单独的 python 进程中）。

Answer 2

根据文档，如果您处于 IPython/Jupyter，您可以允许实验在不可重现的交互环境中运行：

ex = Experiment('jupyter_ex', interactive=True)

https://sacred.readthedocs.io/en/latest/experiment.html#run-the-experiment

Answer 3

The docs 说得好（TL;DR：sacred 会为您检查并失败以警告您）

Warning

By default, Sacred experiments will fail if run in an interactive environment like a REPL or a Jupyter Notebook. This is an intended security measure since in these environments reproducibility cannot be ensured. If needed, this safeguard can be deactivated by passing interactive=True to the experiment like this:
ex = Experiment('jupyter_ex', interactive=True)

将 Sacred Module 与 iPython 一起使用

Using Sacred Module with iPython

python

ipython

python-2.7

python-sacred

Warning