import turtlewin=turtle.Screen()t = turtle.Turtle()
t.width(5)#The vertical and horizontal lines 
t.left(90)
t.forward(70)
t.left(90)
t.forward(20)t.left(90)
t.forward(60)
t.left(120)
t.forward(35)
t.backward(10)
t.penup()
t.home()#first small box
t.pendown()
t.left(90)
t.forward(70)
for i in range(3):t.left(90)t.forward(20)#second small box
for i in range(2):t.right(90)t.forward(20)t.home()win.exitonclick()

As you can see the character that I want to draw using python turtle has extended lines at the horizontal line on top and the slanted line below. How do I do that in my code?

You can simply use the turtle.write method to draw the character for the symbol:

from turtle import Screen, Turtlescreen = Screen()turtle = Turtle()
turtle.write("耳", font=("Arial", 50, "normal"))