Dfyjkt

Here is the code that I'm trying to run via ssh into my raspberry pi. It usually works fine when I have a keyboard and monitor connected directly to the raspberry pi, but it doesn't run when I am using ssh.

import pygame, sys, time
from pygame.locals import *

pygame.init()
pygame.joystick.init()
joystick = pygame.joystick.Joystick(0)
joystick.init()
#screen = pygame.display.set_mode((400,300))
#pygame.display.set_caption('Hello World')

interval = 0.01

# get count of joysticks=1, axes=27, buttons=19 for DualShock 3

joystick_count = pygame.joystick.get_count()
print("joystick_count")
print(joystick_count)
print("--------------")

numaxes = joystick.get_numaxes()
print("numaxes")
print(numaxes)
print("--------------")

numbuttons = joystick.get_numbuttons()
print("numbuttons")
print(numbuttons)
wprint("--------------")

loopQuit = False
while loopQuit == False:

 # test joystick axes
 # outstr = ""
 # for i in range(0,4):
 # axis = joystick.get_axis(i)
 # outstr = outstr + str(i) + ":" + str(axis) + "|"
 # print(outstr)

 # test controller buttons
 outstr = ""
 for i in range(0,numbuttons):
 button = joystick.get_button(i)
 outstr = outstr + str(i) + ":" + str(button) + "|"
 print(outstr)

 for event in pygame.event.get():
 if event.type == QUIT:
 loopQuit = True
 elif event.type == pygame.KEYDOWN:
 if event.key == pygame.K_ESCAPE:
 loopQuit = True

The error that I am getting is
Traceback (most recent call last):
File "testing_joystick.py", line 47, in
for event in pygame.event.get():
pygame.error: video system not initialized

Can anyone help me figure out how to get around this error please?

Well you have not initialized your window yet. It looks like you may or may not have commented it out: #screen = pygame.display.set_mode((400, 300)). Many of pygame's events rely on the window. Simply un-comment your screen initialization and it should work fine.

I know it's been a while since the question has been posted, but I faced the same problem today.

For me the sudo command resolved the ssh problem.

sudo python code_path.py

I had a similar issue as described. The problem appears when no X server is available, that's why it works when you have a monitor connected to the Raspberry.

A solution is to run ssh with the X forwarding option:

 ssh -X pi@raspberry_ip_address

Then your program should run as normal:

 python your_code.py

Hope this helps anybody else.