设置笔记本的默认sys.path [英] Setting a default sys.path for a Notebook

问题描述

我所有的.py文件都放在一个文件夹脚本中，而我的所有IPython笔记本都放在一个名为Notebook的文件夹下.

I have all my .py files inside a folder script and all my IPython-notebooks under a folder named Notebook.

脚本中的一个或多个文件中的每个笔记本文件都有多个交叉依赖项.

There are multiple cross dependencies for each notebook file on one or more files on script.

在每个笔记本上都放置sys.path.append似乎很麻烦，我希望有一种方法可以添加默认的查找路径，就像我们在.bash_profile中添加PYTHONPATH一样.

Having sys.path.append on top of every notebook seems cumbersome and I am hoping there is a way to add a default lookup path just like we add PYTHONPATH to .bash_profile.

现在，我执行以下操作:

Now I do the following:

import sys
sys.path.append("<path where DeriveFinalResultSet.py exists>)
import DeriveFinalResultSet as drs

我希望有一个可以进行以下操作的设置:

I wish to have a setting where I can do the below:

import DeriveFinalResultSet as drs

推荐答案

为避免隐藏配置"(即不在源代码控制/特定于机器的内容)并保持您所描述的笔记本/代码分隔，我做类似以下的事情:

To avoid "hidden configurations" (i.e. things that aren't in source control/machine-specific) and to maintain a notebook/code separation like you describe, I do something like the below:

code/
    mymodule.py
    mypackage/
        __init__.py

notebooks/
    mynb.ipynb
    mynb2.ipynb
    paths.py   <--- below

在paths.py中:

import sys
import pathlib
sys.path.insert(0, str(pathlib.Path(__file__).parents[1] / 'code'))
# sys.path[0] = str(pathlib.Path(__file__).parents[1] / 'code')

然后在mynb*.ipynb中我可以很高兴地做到:

Then in mynb*.ipynb I can happily do:

import paths
import mymodule, mypackage

等

后一种形式有效地替换了从空字符串(当前目录)到"code"目录的导入路径，这也许更干净一些.这使得导入对使用os.chdir()之类的东西不敏感.

The latter form effectively replaces the import path from the empty-string (current directory) to the "code" directory, which is perhaps a bit cleaner. This makes imports insensitive to using stuff like os.chdir().

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