覆盖Jupyter Notebook中的先前输出 [英] Overwrite previous output in jupyter notebook

问题描述

让我们假设我有一部分代码运行了特定的时间，并且每1秒输出如下内容:iteration X, score Y.我将用黑盒函数代替此函数:

Let's assume I have a part of code that runs for some specific amount of time and each 1 second outputs something like this: iteration X, score Y. I will substitute this function with my black box function:

from random import uniform
import time

def black_box():
    i = 1
    while True:
        print 'Iteration', i, 'Score:', uniform(0, 1)
        time.sleep(1)
        i += 1

现在，当我在 Jupyter笔记本中运行它时，它会在每行之后输出新行第二:

Now when I run it in Jupyter notebook, it output a new line after each second:

Iteration 1 Score: 0.664167449844
Iteration 2 Score: 0.514757592404
...

是的，当输出变得太大之后，html变得可滚动，但事实是，除了当前的最后一行之外，我不需要任何这些行.因此，我希望只显示1行(最后一行)，而不是在n秒后显示n行.

Yes, after when the output becomes too big, the html becomes scrollable, but the thing is that I do not need any of these lines except of currently the last one. So instead of having n lines after n seconds, I want to have only 1 line (the last one) shown.

我没有在文档中找到任何类似的东西，也没有从魔术中寻找任何东西. 一个问题，标题几乎相同，但不相关的.

I have not found anything like this in documentation or looking through magic. A question with almost the same title but irrelevant.

推荐答案

@cel是正确的:

@cel is right: ipython notebook clear cell output in code

使用clear_output()会使您的笔记本电脑产生抖动.我建议也使用display()函数，就像这样(Python 2.7):

Using the clear_output() gives makes your Notebook have the jitters, though. I recommend using the display() function as well, like this (Python 2.7):

from random import uniform
import time
from IPython.display import display, clear_output

def black_box():
i = 1
while True:
    clear_output(wait=True)
    display('Iteration '+str(i)+' Score: '+str(uniform(0, 1)))
    time.sleep(1)
    i += 1

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