This is highly experimental, but we could even imagine make the notebook reactive. This can be achieved by reaching into the ipython internals and overwriting the namespace. This has bugs.

In [1]:

import pandas as pd
from io import BytesIO

In [2]:

from reactpy import Reactive, Interact, Plot, FileData, Output
O = Output
%matplotlib widget

In [3]:

r = reactive = Reactive(lazy_eval=False)
r.update(get_ipython().user_ns)
get_ipython().user_ns =  r

In [4]:

a = 2
b = r(lambda a: a+3)
o = O(lambda a,b: (a, b))
o

Output(outputs=({'output_type': 'stream', 'name': 'stdout', 'text': '(2, 5)'},))

In [5]:

a = 3

In [6]:

c = Interact('c', (-100, 100, 1))
d = Interact('d', (-100, 100, 1))
oo = O(lambda c,d: (c,d))
oo

interactive(children=(IntSlider(value=0, description='value', min=-100), Output()), _dom_classes=('widget-inte…

interactive(children=(IntSlider(value=0, description='value', min=-100), Output()), _dom_classes=('widget-inte…

Output(outputs=({'output_type': 'stream', 'name': 'stdout', 'text': '(0, 0)'},))

In [7]:

p = Plot(lambda ax, c, d: ax.plot([(x+c)*(x+d)*x for x in range(-100, 100)]))

Canvas(toolbar=Toolbar(toolitems=[('Home', 'Reset original view', 'home', 'home'), ('Back', 'Back to previous …

In [8]:

alist = [0, 2, 5, 6, 8, 9, 11, 23, 21, 32]
item = 6
alist, item

Out[8]:

([0, 2, 5, 6, 8, 9, 11, 23, 21, 32], 6)

In [9]:

first = 0
last = alist.__len__()-1
found = False
mon = O(lambda  first, last, found: (first, last, found))
mon

Output(outputs=({'output_type': 'stream', 'name': 'stdout', 'text': '(0, 9, False)'},))

In [10]:

while first<=last and not found:
    midpoint = (first + last)//2
    if alist[midpoint] == item:
        found = True
    else:
        if item < alist[midpoint]:
            last = midpoint-1
        else:
            first = midpoint+1

In [12]:

x = 2
y = 3
@reactive
def z(x, y):
    return x+y
z

Out[12]:

In [13]:

x = 5

In [14]:

Out[14]:

In [16]:

@O
def o(z):
    return z
o

Output(outputs=({'output_type': 'stream', 'name': 'stdout', 'text': '8'},))

In [18]:

x = 39