Widget trait events

gistfile1.py

from IPython.html import widgets

toggle = widgets.ToggleButton()
def foo():
    if toggle.value is True:
        print("The Toggle is True!")
    else:
        print("The Toggle is False!")
toggle.on_trait_change(foo)
display(toggle)

gistfile2.py

import matplotlib.pyplot as plt
from random import gauss

# This is the idiomatic way to initiatlize Matplotlib for the Jupyter Notebook
%matplotlib inline
gaussian = [gauss(2, 0.5) for x in range(0, 1000)]
bin_count = 10
hist_plot = plt.hist(gaussian, bins=bin_count)
select_widget = widgets.Dropdown(value="10", options=["10", "20", "30"])
def change_plot_bins(trait_name, old_bin_ct, new_bin_ct):
    int_bin_ct = int(new_bin_ct)
    plt.close("all")
    hist_plot = plt.hist(gaussian, bins=int_bin_ct)
    plt.show(hist_plot)
select_widget.on_trait_change(change_plot_bins, "value")
select_widget