使用神圣模块与iPython

问题描述 投票:4回答:3

我正在尝试为Python设置sacred,我正在通过tutorial。我能够使用pip install sacred设置神圣而没有任何问题。我在运行基本代码时遇到问题:

from sacred import Experiment

ex = Experiment("hello_world")

运行此代码将返回a 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"

我不确定为什么会出现这个错误。在运行代码之前,文档没有说明如何设置实验文件。任何帮助将不胜感激!

python python-2.7 ipython python-sacred
3个回答
3
投票

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

因此,要使示例正常工作,请将示例代码放入文件中并直接运行该文件。

如果您正在使用ipython,那么您可以尝试使用%%python命令,该命令将在运行之前有效地捕获您将其提供到文件中的代码(在单独的python进程中)。


3
投票

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

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

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


0
投票

The docs很好地说(TL; DR:神圣地为你检查这个并且为了警告你失败了)

Warning

默认情况下,如果在REPL或Jupyter Notebook等交互式环境中运行,则Sacred实验将失败。这是一种预期的安全措施,因为在这些环境中无法确保再现性。如果需要,可以通过将interactive=True传递给实验来停用此安全措施,如下所示:

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