Python：使用 Jupyter Notebook 运行代码（在线）

Question

I am new to the world of Python. I am using a computer with very little space left, so I decided to try to use the online version of Python without explicitly installing anacondas or python.

I used this link over here: https://notebooks.gesis.org/binder/jupyter/user/ipython-ipython-in-depth-eer5tgdf/notebooks/binder/Index.ipynb# , and then I opened a new file. I am trying to re-run the code from this github repository: https://github.com/brohrer/byo_decision_tree/blob/main/decision_tree.py

I tried running the following code and got this error:

import numpy as np
import matplotlib.pyplot as plt

from tree_node import TreeNode

import numpy as np
import matplotlib.pyplot as plt
​
from tree_node import TreeNode
​
---------------------------------------------------------------------------
ModuleNotFoundError                       Traceback (most recent call last)
<ipython-input-1-984dee29eb66> in <module>
      2 import matplotlib.pyplot as plt
      3 
----> 4 from tree_node import TreeNode

ModuleNotFoundError: No module named 'tree_node'

This line is preventing me from running the rest of the code. Can someone please show me what am I doing wrong?

1. Is it simply not possible to run python code online without having downloaded anaconda?

2. Or am I approaching this problem the wrong way? Perhaps the version of python I am using is incorrect? Or there are some dependencies required that I have not yet installed.

Can someone please show me how to resolve this problem?

Thanks

Answer 1

To simplify the development different functionalities are allocated to different scripts/modules.

You are simply taking the main script ( decision_tree.py ) and trying to run it. But it has some imports from other modules. For example, in the directory where you opened decision_tree.py , there is also tree_node.py , which has TreeNode class, which is imported into decision_tree.py .

So, one of the options is to copy this TreeNode class into decision_tree.py and put it above DecisionTree class.

Answer 2

You can use Google Colab. It is free and you can access it from your google drive account. Basically Colab is a Jupiter notebook running on cloud. If you are familiar with Jupiter notebook, you will learn Colab quickly.

For more Information: Google Colab

Answer 3

Did you try to?pip install tree_node. No module usually means module not installed.