Write a menu driven program to create mathematical 3d objects in python

from visual import *
def show_curve():
curve(x=arange(100), y=arange(100)**0.5, color=color.red)
def show_sphere():
ball = sphere(pos=(1,2,1), radius=0.5)
def show_arraow():
pointer=arrow(pos=(0, 2, 1), axis=(5, 0, 0), shaftwidth=1)
def show_rings():
ring(pos=(1, 1, 1), axis=(0, 1, 0), radius=0.5, thickness=0.1)
def show_cylinder():
rod= cylinder(pos=(0, 2, 1), axis=(5, 0, 0), radius=1)
def menu():
print('1. Curve')
print('2. Sphere')
print('3. Cone')
print('4. Arrow')
print('5. Rings')
print('6. Cylinder')
ch= 'y'
while(ch=='y'):
menu()
choice = int(input('Enter choice..'))
if(choice == 1):
show_curve()
elif(choice == 2):
show_sphere()
elif(choice == 3):
show_cone()
elif(choice == 4):
show_arrow()
elif(choice == 5):
show_rings()
elif(choice == 6):
show_cylinder()
else:
print('Wrong choice')
ch= input('Do you want to continue (y/n)...')