test.py

from __future__ import division
from src.optimization import tangency
from bokeh.io import vform
from bokeh.plotting import figure, output_file, show
from bokeh.models import *
from numpy import *


def cobbDouglas_points(xs,px,py,z):
    y =[]
    for x in xs:
        if x==0: x=1
        y.append(pow(z/(pow(x,px)),(1/py)))
    return y

def cobbDouglas(x,px,y,py):

    return  x**(px)*y**py

def budgetLine(x1,px,py,m):
    y= []
    for x in x1:
        y.append(((m/py)-((px*x)/py)))
    return y



print(cobbDouglas(5,0.5,5,0.5))

output_file("test.html")
x2 = list(range(0,100))
yBL= budgetLine(x2,1,1,10)

##find the optimal point using this method
result = tangency(1,1,10)
u = cobbDouglas(result[0],0.5,result[1],0.5)

def utility_func(m):
    result = tangency(1,1,m)
    return cobbDouglas(result[0],0.5,result[1],0.5)


y2= cobbDouglas_points(x2,0.5,0.5,u)

p= figure(y_range=(0, max(yBL)),x_range=(0,15), plot_width=400, plot_height=400)


source1 = ColumnDataSource(data=dict(x=x2,y=yBL))
#source2 = ColumnDataSource(data=dict(x=x2,y=y2,u=u))

p.line(x2,yBL,source=source1, line_width=2)
p.line(x2,y2,source=source2, line_width=1)

callback = Callback(args=dict(source1=source1,source2=source2,), code="""
    var data1 = source1.get('data');
    var data2 = source2.get('data');
    var f = cb_obj.get('value');
    x1 = data1['x']
    y1 = data1['y']
 //   x2 = data2['x']
  //  y2 = data2['y']
   // u = data2['u']
    for (i = 0; i < x1.length; i++) {
        y1[i]= 5-f*x1[i];
       // y2[i] = Math.pow(u/(Math.pow(x2[i],0.5)),(1/0.5));
      //  console.log(u);
    }
    source1.trigger('change');
  //  source2.trigger('change');
""")

#I was trying to call this callback to get the new value to keep the tangency
def myCallBack():

    result = tangency(slider.value,1,10)
    u = cobbDouglas(result[0],0.5,result[1],0.5)
    print(u)


slider = Slider(start=1, end=100, value=1, step=1,
                title="value", callback=callback)
                
#none of the following worked!
#slider.setup_events()
#slider.on_change('value', 'input_change')
# print(x1,y1)

#def input_change():
#    print("input has changed!")

layout = vform(slider, p)
show(layout)