Ipywidgets Interact Example

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Students, if you happen to come across this page, you may ignore it.

Example of How we would like to use interact from Ipywidgets. Working properly, a slider would appear and could be used to change the graph.

import numpy as np
import matplotlib.pyplot as plt
from ipywidgets import interact, interactive, fixed, interact_manual
import ipywidgets as widgets

g = 9.81 #m/s

def inclined_plane_velocity_and_strain_rate(alpha,rho,eta,h): #alpha in degrees, rho in kg/m^3, eta in Pa*s, and y and h in m
    step = 1
    y = y = np.arange(0,h+step,step)
    
    Velocities = (rho * g * np.sin(np.radians(alpha)) / (2*eta)) * (h**2 - y**2) # m/s velocity
    Strain_Rate = -(rho * g * np.sin(np.radians(alpha)) * y / (2*eta)) # (1/s) strain rate
    
    
    fig, (ax,ax1) = plt.subplots(1,2,figsize = (15,5))
    ax.plot(Velocities,y,color = 'red')
    ax.set_ylabel('Depth (m)')
    ax.set_xlabel('Velocity (m/s)')
    ax.set_ylim(0,h+step)
    ax.invert_yaxis()
    ax.invert_xaxis()
    ax.set_xlim(350000,0)
    ax.set_title('Inclined Plane Flow Velocity vs Depth')

    ax1.plot(Strain_Rate,y)
    ax1.set_ylabel('Depth (m)')
    ax1.set_xlabel('Strain Rate (1/s)')
    ax1.set_title('Inclined Plane Flow Strain Rate vs Depth')
    ax1.set_ylim(0,h+step)
    ax1.invert_yaxis()

    plt.show()
    
eta = 1e21 # Pa*s
rho = 3000 # kg / m^3

style = {'description_width': 'initial'}
layout = {'width': '400px'}

interact(inclined_plane_velocity_and_strain_rate,alpha = widgets.IntSlider(min=0, max=70, step=5, value=10,description = 'Angle of the Plane (degrees)',layout = layout, style=style),rho = fixed(rho),eta=fixed(eta),h = widgets.IntSlider(min=0, max=100, step=5, value=10,description = 'Thickness of the Flow (m)',layout = layout,style=style) )

Here is an alternative method if IntSlider() can be displayed but interact doesn't work:

import ipywidgets as widgets
w = widgets.IntSlider()
display(w)

Error displaying widget

print(w.value)

        hello world