在jupyter notebook中调用.ipynb文件方式


Posted in Python onApril 14, 2020

正常来说在jupyter notebook 中只能调用.py文件,要想要调用jupyter notebook自己的文件会报错。

Jupyter Notebook官网介绍了一种简单的方法:

http://jupyter-notebook.readthedocs.io/en/latest/examples/Notebook/Importing%20Notebooks.html

添加jupyter notebook解析文件

首先,创建一个python文件,例如Ipynb_importer.py,代码如下:

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())

调用jupyter notebook module

只要在我们的工作目录下放置Ipynb_importer.py文件,就可以正常调用所有的jupyter notebook文件。 这种方法的本质就是使用一个jupyter notenook解析器先对.ipynb文件进行解析,把文件内的各个模块加载到内存里供其他python文件调用。

新建一个文件foo.ipynb

def foo():
 print("foo")

再新建一个ipynb文件,调用foo这个文件

import Ipynb_importer
import foo
foo.foo()

运行结果如下:

importing Jupyter notebook from foo.ipynb
foo

补充知识:jupyter notebook_主函数文件如何调用类文件

使用jupyter notebook编写python程序,rw_visual.jpynb是写的主函数,random_walk.jpynb是类(如图)。在主函数中将类实例化后运行会报错,经网络查找解决了问题,缺少Ipynb_importer.py这样一个链接文件。

在jupyter notebook中调用.ipynb文件方式

解决方法:

1、在同一路径下创建名为Ipynb_importer.py的文件:File-->download as-->Python(.py),该文件内容如下:

#!/usr/bin/env python
# coding: utf-8
# In[ ]:
 
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、在主函数中import Ipynb_importer

import matplotlib.pyplot as plt
import Ipynb_importer
 
from random_walk import RandomWalk
 
rw = RandomWalk()
rw.fill_walk()
plt.scatter(rw.x_values, rw.y_values, s=15)
plt.show()

3、运行主函数,调用成功

ps:random_walk.jpynb文件内容如下:

from random import choice
 
class RandomWalk():
 def __init__(self, num_points=5000):
  self.num_points = num_points
  self.x_values = [0]
  self.y_values = [0]
  
 def fill_walk(self):
  while len(self.x_values) < self.num_points:
   x_direction = choice([1,-1])
   x_distance = choice([0,1,2,3,4])
   x_step = x_direction * x_distance
   
   y_direction = choice([1,-1])
   y_distance = choice([0,1,2,3,4])
   y_step = y_direction * y_distance
   
   if x_step == 0 and y_step == 0:
    continue
    
   next_x = self.x_values[-1] + x_step
   next_y = self.y_values[-1] + y_step
   
   self.x_values.append(next_x)
   self.y_values.append(next_y)

运行结果:

在jupyter notebook中调用.ipynb文件方式

以上这篇在jupyter notebook中调用.ipynb文件方式就是小编分享给大家的全部内容了,希望能给大家一个参考,也希望大家多多支持三水点靠木。

Python 相关文章推荐
在Python中用keys()方法返回字典键的教程
May 21 Python
深入理解python try异常处理机制
Jun 01 Python
Python中的descriptor描述器简明使用指南
Jun 02 Python
利用python批量给云主机配置安全组的方法教程
Jun 21 Python
Python实现生成随机日期字符串的方法示例
Dec 25 Python
python实现电脑自动关机
Jun 20 Python
python制作图片缩略图
Apr 30 Python
python3连接MySQL8.0的两种方式
Feb 17 Python
有趣的Python图片制作之如何用QQ好友头像拼接出里昂
Apr 22 Python
解决Python数据可视化中文部分显示方块问题
May 16 Python
如何通过Python实现RabbitMQ延迟队列
Nov 28 Python
pytorch 如何把图像数据集进行划分成train,test和val
May 31 Python
使用jupyter notebook将文件保存为Markdown,HTML等文件格式
Apr 14 #Python
Python使用pyyaml模块处理yaml数据
Apr 14 #Python
Jupyter Notebook打开任意文件夹操作
Apr 14 #Python
Python requests模块cookie实例解析
Apr 14 #Python
Python requests模块session代码实例
Apr 14 #Python
使用Jupyter notebooks上传文件夹或大量数据到服务器
Apr 14 #Python
服务器端jupyter notebook映射到本地浏览器的操作
Apr 14 #Python
You might like
PHP CURL模拟GET及POST函数代码
2010/04/25 PHP
PHP运行模式的深入理解
2013/06/03 PHP
thinkphp如何获取客户端IP
2015/11/03 PHP
PHP简单实现防止SQL注入的方法
2018/03/13 PHP
javascript之通用简单的table选项卡实现(二)
2010/05/09 Javascript
node.js中的buffer.length方法使用说明
2014/12/14 Javascript
jQuery对象的selector属性用法实例
2014/12/27 Javascript
AngularJS中$interval的用法详解
2016/02/02 Javascript
深入浅析search 搜索框的写法
2016/08/02 Javascript
Node.js 使用jade模板引擎的示例
2018/05/11 Javascript
js使用ajax传值给后台,后台返回字符串处理方法
2018/08/08 Javascript
Angular使用Restful的增删改
2018/12/28 Javascript
解决vue admin element noCache设置无效的问题
2019/11/12 Javascript
JS快速实现简单计算器
2020/04/08 Javascript
python同时给两个收件人发送邮件的方法
2015/04/30 Python
Python实现对excel文件列表值进行统计的方法
2015/07/25 Python
Python爬虫实现爬取百度百科词条功能实例
2019/04/05 Python
django项目中使用手机号登录的实例代码
2019/08/15 Python
使用python绘制二维图形示例
2019/11/22 Python
python requests模拟登陆github的实现方法
2019/12/26 Python
python使用ctypes调用扩展模块的实例方法
2020/01/28 Python
python 8种必备的gui库
2020/08/27 Python
关于Kotlin中SAM转换的那些事
2020/09/15 Python
Python中使用Selenium环境安装的方法步骤
2021/02/22 Python
利用CSS3实现文本框的清除按钮相关的一些效果
2015/06/23 HTML / CSS
利用SVG和CSS3来实现一个炫酷的边框动画
2015/07/22 HTML / CSS
详解H5本地储存Web Storage
2017/07/03 HTML / CSS
德国鞋子网上商店:Omoda.de
2017/03/31 全球购物
expedia比利时:预订航班+酒店并省钱
2018/07/13 全球购物
职专应届生求职信
2013/11/16 职场文书
毕业实习个人鉴定范文
2013/12/10 职场文书
五年级学生评语
2014/04/22 职场文书
大专生找工作自荐书
2014/06/10 职场文书
承兑汇票转让证明怎么写?
2014/11/30 职场文书
2014年信访维稳工作总结
2014/12/08 职场文书
Java基础之线程锁相关知识总结
2021/06/30 Java/Android