ipywidgets (nope) - jlab examples jlite

curious to see how it goes; in a nutshell:

fine in jlab
jb1: html output has the widgets, but they don’t interact (frozen output)
jb2: not working at all, needs a kernel connection to display the widgets

from ipywidgets import interact, interactive, fixed, interact_manual
import ipywidgets as widgets

from the doc (no graphic)¶

def f(x):
    return x

The history saving thread hit an unexpected error (OperationalError('attempt to write a readonly database')).History will not be written to the database.

interact(f, x=10);

10

from the doc (with interactive_output)¶

import ipywidgets as widgets
from IPython.display import display

a = widgets.IntSlider(value=5, min=0, max=10)

def f1(a):
    display(a)

def f2(a):
    display(a * 2)

out1 = widgets.interactive_output(f1, {'a': a})
out2 = widgets.interactive_output(f2, {'a': a})

display(a)
display(out1)
display(out2)

5

10

basic plot¶

%matplotlib ipympl

import ipywidgets as widgets

import numpy as np
import matplotlib.pyplot as plt

X = np.linspace(0, 4*np.pi, 200)

def frequency(f):
    plt.clf()
    Y = np.sin(f*X)
    plt.plot(X, Y)
    plt.show()

plt.figure()

interact(frequency, f=widgets.FloatSlider(min=1, max=10, value=2));