Heat transfer with internal Heat generation same temperature on both side graph plotting in python

In this case suppose we have a slab of and temperature on both side face of the is 60°C .Now there is some internal heat generation is going on inside the slab whose value is 80W /m^3 and the thickness of the slab is 1.2m . we will try to plot this on graph and see how to calculate temperature at different distance from one side of the slab

# i have made the code little shorter and better now it give more output 

#CONSTRUCTIVE CRITICISM HIGHLY APPRECIATE

from matplotlib.pyplot import *

from numpy import *

from ipywidgets import interactive

t1 = t2 = 60 # temperature at both side of the slab is same unit in degree celcius

qg = 80 #w/m^3  internal heat generation

k = 1.148 # W/mK heat conduction coefficient

d = 1.2 # thickness of slab is 1.2 meter

def f(j):

    x = linspace(0,1.2,360)

    th = linspace(0,360,360)

    t = qg/(2*k)*(d-j)*j +t1 # to get the value of temperature at certain distance

    tth = qg/(2*k)*(d-x)*x+t1

    axis([0,1.2,0,80]) #here 0 and 1.2 belong to x axis and 0 and 80 belong to y axis

    a =[j]

    b =[th]

    title('Heat generation graph when temperature on both side is same')

    xlabel('Distance in meter')

    ylabel('temperature in degree celcius')

    plot(x,tth,j,t,'o')

    

    print('tempeature at x = ',j ,' is ',t,' C')

    

interactive_plot = interactive(f,j=(0,1.2,.01))

interactive_plot