python学习系列二：jupyter notebook中调用其他.ipynb模块内的变量或者函数

大致方法有三：

1、直接将被掉文件转为.py格式

可在终端运行：jupyter nbconvert --to python XXX.ipynb    #XXX.ipynb就是你想调用的.ipynb文件

2、在每个.ipynb文件后面添加自动转换命令

try:
    !jupyter nbconvert --to python import_test.ipynb   #注意这是shell命令，不要忘记加！
except:
    pass

3、①、在你的工作路径下加入如下文件：

Ipynb_importer.py
当然这个文件也是在jupyter中新建的.ipynb文件转过来的，如果是.ipynb格式还是不行的

这个文件的代码，完全复制如下代码：

#!/usr/bin/env python
# coding: utf-8

# In[12]:


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

class NotebookFinder(object):
    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):
    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):
    def __init__(self, path=None):
        self.shell = InteractiveShell.instance()
        self.path = path

    def load_module(self, fullname):
        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__)  #注意此处的缩进
        finally:
            self.shell.user_ns = save_user_ns
        return mod
sys.meta_path.append(NotebookFinder())

一定要注意缩进，不然会报错，我开始的时候及时 exec(code, mod.__dict__)这一行没有缩进到于上一行代码对其，导致报错：

SyntaxError: unexpected EOF while parsing

把上面的缩进四个空格之后，就可以了

可以先自己在jupyter中按Enter+shift运行试下

②、在你想引用的其他.ipynb的文件内加入

import Ipynb_importer
import some_module   
"""
some_module就是你想引用的.ipynb文件，这种方法有个缺点，就是tab键不能自动补全这个文件名，要你自己一点点输入，而且后面的调用也不会自动补全，要手动输入
"""

以上三种方法由易到难，每种都亲测有效，你可以自己选择用哪种方法