Installing and running vpython with Python 3.5 on Windows 10 - vpython

Question

I'm trying to install vpython with python3.5 on windows 10.
I used the following commands in the cmd:
pip install vpython
pip install update --ipython
If I then try to run some vpython code (copied from internet to simulate projectile motion):
from vpython import *
from math import sin, cos
initialHeight = 4.6
initialVelocity = 24
Angle = 65
#Set up the display window
scene1 = display(title = "Projectile Motion for the uninitiated",
x=0,y=0, width=800, height=600,
range=10, background=colour.white,
center = (10,initialHeight,0))
#Create objects
table = box(pos=(-1,initialHeight - 1,0), size=(5,1,4))
ball1 = sphere(pos=(0,initialHeight,0),radius=1,
color=color.green, make_trail = true)
ball2 = sphere(pos=(0,initialHeight,0),radius=1,
color=color.red, make_trail = true)
floor = box(pos=(0,0,0), size =(100,0.25,10))
t=0
dt=0.01
g=-32 #ft/s**2
Fgrav = vector(0,g*dt,0)
#velocity vector for ball1
ball1v = vector(initialVelocity*cos(Angle*pi/180),
initialVelocity*sin(Angle*pi/180),0)
#This loop puts it into motion
while True:
rate(30) #speeds it up
ball1v = ballv + Fgrav
ball1.pos += ball1.v*dt
ball2.pos = (initialVelocity*cos(Angle*pi/180)*t,
initialHeight + initialVelocity*t*sin(Angle*pi/180) - 16*t**2)
if ball1.y < 0: #when ball hits floor
print("ball1.pos = ", ball1.pos, "t = ", t)
print("ball2.pos = ", ball2.pos, "t = ", t)
break
When I run this I then get the following errors:
Traceback (most recent call last):
File "C:/Users/yours_truly/Google Drive/Python/projectile motion.py", line 1, in <module>
from vpython import *
File "C:\Users\yours_truly\AppData\Local\Programs\Python\Python35-32\lib\site-packages\vpython\__init__.py", line 10, in <module>
from .vpython import *
File "C:\Users\yours_truly\AppData\Local\Programs\Python\Python35-32\lib\site-packages\vpython\vpython.py", line 442, in <module>
get_ipython().kernel.comm_manager.register_target('glow', GlowWidget)
AttributeError: 'NoneType' object has no attribute 'kernel'
I cannot understand the problem here, nor can I make sense of the discussions of this that I have found online. Can anyone tell me what the score is here? Is vpython incompatible with python 3.5 (which I've read in some places) or is there a workaround (which I've also read in other places)?
Thank you.

Answer 1

I cannot remember when exactly support for Python 3.5 became available; it is certainly supported now. But the problem may have been associated with the fact that the program has a number of errors. Here is a version that works, including with Python 3.5 on Windows 10. The corrections were to change true -> True, bal
from vpython import *
from math import sin, cos
initialHeight = 4.6
initialVelocity = 24
Angle = 65
#Set up the display window
scene1 = display(title = "Projectile Motion for the uninitiated",
x=0,y=0, width=800, height=600,
range=10, background=color.white,
center = (10,initialHeight,0))
#Create objects
table = box(pos=vec(-1,initialHeight - 1,0), size=vec(5,1,4))
ball1 = sphere(pos=vec(0,initialHeight,0),radius=1,
color=color.green, make_trail = True)
ball2 = sphere(pos=vec(0,initialHeight,0),radius=1,
color=color.red, make_trail = True)
floor = box(pos=vec(0,0,0), size =vec(100,0.25,10))
t=0
dt=0.01
g=-32 #ft/s**2
Fgrav = vector(0,g*dt,0)
#velocity vector for ball1
ball1v = vector(initialVelocity*cos(Angle*pi/180),
initialVelocity*sin(Angle*pi/180),0)
#This loop puts it into motion
while True:
rate(30) #speeds it up
ball1v = ball1v + Fgrav
ball1.pos += ball1v*dt
ball2.pos = vec(initialVelocity*cos(Angle*pi/180)*t,
initialHeight + initialVelocity*t*sin(Angle*pi/180) - 16*t**2,0)
if ball1.pos.y < 0: #when ball hits floor
print("ball1.pos = ", ball1.pos, "t = ", t)
print("ball2.pos = ", ball2.pos, "t = ", t)
break