jupyter notebook或阿裡雲DSW伺服器上怎麼調用同一目錄下檔案函數

不管是jupyter notebook或阿裡雲DSW伺服器，如果直接調用同目錄下另外檔案中的函數時，往往會以“XXX子產品不存在”的錯誤來回報函數無法調用，那麼這個問題是否可以解決呢？如果可以，那麼怎麼解決呢？

在這裡，我先給出答案：可以解決，而且解決方案很簡單！！！（在本人使用阿裡雲DSW過程中發現，阿裡雲機器學習API-DSW平台其運作機制與jupyter notebook類似，是以針對jupyter notebook無法調用同一目錄下檔案函數問題的解決方案在阿裡雲DSW平台上應該是同樣可行。當然，實踐結果也表明了上述推理是正确的。）

下面主要給大家闡述一下上述問題的解決方案：

1、在jupyter notebook界面建立xx.ipynb檔案，名字随意，代碼内容如下：

import io, os,sys,types
from IPython import get_ipython
from nbformat import read
from IPython.core.interactiveshell import InteractiveShell

class NotebookFinder(object):
    """Module finder that locates Jupyter Notebooks"""
    def __init__(self):
        self.loaders = {}

    def find_module(self, fullname, path=None):
        nb_path = find_notebook(fullname, path)
        if not nb_path:
            return

        key = path
        if path:
            # lists aren't hashable
            key = os.path.sep.join(path)

        if key not in self.loaders:
            self.loaders[key] = NotebookLoader(path)
        return self.loaders[key]

def find_notebook(fullname, path=None):
    """find a notebook, given its fully qualified name and an optional path

    This turns "foo.bar" into "foo/bar.ipynb"
    and tries turning "Foo_Bar" into "Foo Bar" if Foo_Bar
    does not exist.
    """
    name = fullname.rsplit('.', 1)[-1]
    if not path:
        path = ['']
    for d in path:
        nb_path = os.path.join(d, name + ".ipynb")
        if os.path.isfile(nb_path):
            return nb_path
        # let import Notebook_Name find "Notebook Name.ipynb"
        nb_path = nb_path.replace("_", " ")
        if os.path.isfile(nb_path):
            return nb_path

class NotebookLoader(object):
    """Module Loader for Jupyter Notebooks"""
    def __init__(self, path=None):
        self.shell = InteractiveShell.instance()
        self.path = path

    def load_module(self, fullname):
        """import a notebook as a module"""
        path = find_notebook(fullname, self.path)

        print ("importing Jupyter notebook from %s" % path)

        # load the notebook object
        with io.open(path, 'r', encoding='utf-8') as f:
            nb = read(f, 4)


        # create the module and add it to sys.modules
        # if name in sys.modules:
        #    return sys.modules[name]
        mod = types.ModuleType(fullname)
        mod.__file__ = path
        mod.__loader__ = self
        mod.__dict__['get_ipython'] = get_ipython
        sys.modules[fullname] = mod

        # extra work to ensure that magics that would affect the user_ns
        # actually affect the notebook module's ns
        save_user_ns = self.shell.user_ns
        self.shell.user_ns = mod.__dict__

        try:
          for cell in nb.cells:
            if cell.cell_type == 'code':
                # transform the input to executable Python
                code = self.shell.input_transformer_manager.transform_cell(cell.source)
                # run the code in themodule
                exec(code, mod.__dict__)
        finally:
            self.shell.user_ns = save_user_ns
        return mod
sys.meta_path.append(NotebookFinder())

           

2、将xx.ipynb檔案另存為.py檔案，轉存過程如下圖：

3、将.py檔案放入需調用函數目錄下，即可實作同目錄下另外檔案中函數的調用了，成功調用結果如下圖：

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