OpenGL in Python (PyOpenGL)

OpenGL in Python. A PyOpenGL demo
Download link:
PyOpenGl: https://pypi.python.org/pypi/PyOpenGL/3.0.2
Source Code:
from OpenGL.GL import *
from OpenGL.GLUT import *
from OpenGL.GLU import *
import sys
window = 0
rtri = 0.0
rquad = 2.0
speed = 0.1
Wireframe = True

def InitGL(Width, Height):
glClearColor(0.3, 0.3, 0.3, 0.0)
glClearDepth(1.0)
glDepthFunc(GL_LESS)
glEnable(GL_DEPTH_TEST)
glPolygonMode(GL_FRONT, GL_LINE)
glPolygonMode(GL_BACK, GL_LINE)
glShadeModel(GL_SMOOTH)

glMatrixMode(GL_PROJECTION)
glLoadIdentity()

gluPerspective(45.0, float(Width)/float(Height), 0.1, 100.0)

glMatrixMode(GL_MODELVIEW)


def ReSizeGLScene(Width, Height):
if Height == 0:
Height = 1

glViewport(0, 0, Width, Height)
glMatrixMode(GL_PROJECTION)
glLoadIdentity()
gluPerspective(45.0, float(Width)/float(Height), 0.1, 100.0)
glMatrixMode(GL_MODELVIEW)

def DrawGLScene():
global rtri, rquad ,speed

glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
glLoadIdentity()
glTranslatef(0.0,0.0,-5.0)
glRotatef(rquad,speed,speed,speed)
glBegin(GL_QUADS)

glColor3f(0.0,1.0,0.0)
glVertex3f( 1.0, 1.0,-1.0)
glVertex3f(-1.0, 1.0,-1.0)
glVertex3f(-1.0, 1.0, 1.0)
glVertex3f( 1.0, 1.0, 1.0)

glColor3f(1.0,0.5,0.0)
glVertex3f( 1.0,-1.0, 1.0)
glVertex3f(-1.0,-1.0, 1.0)
glVertex3f(-1.0,-1.0,-1.0)
glVertex3f( 1.0,-1.0,-1.0)

glColor3f(1.0,0.0,0.0)
glVertex3f( 1.0, 1.0, 1.0)
glVertex3f(-1.0, 1.0, 1.0)
glVertex3f(-1.0,-1.0, 1.0)
glVertex3f( 1.0,-1.0, 1.0)

glColor3f(1.0,1.0,0.0)
glVertex3f( 1.0,-1.0,-1.0)
glVertex3f(-1.0,-1.0,-1.0)
glVertex3f(-1.0, 1.0,-1.0)
glVertex3f( 1.0, 1.0,-1.0)

glColor3f(0.0,0.0,1.0)
glVertex3f(-1.0, 1.0, 1.0)
glVertex3f(-1.0, 1.0,-1.0)
glVertex3f(-1.0,-1.0,-1.0)
glVertex3f(-1.0,-1.0, 1.0)

glColor3f(1.0,1.0,1.0)
glVertex3f( 1.0, 1.0,-1.0)
glVertex3f( 1.0, 1.0, 1.0)
glVertex3f( 1.0,-1.0, 1.0)
glVertex3f( 1.0,-1.0,-1.0)
glEnd()
rtri = rtri + 0.2
rquad = rquad - 0.15
glutSwapBuffers()
def keyPressed(*args):
global rquad
if args[0]==b"x":
global Wireframe
if Wireframe==False:
glPolygonMode(GL_FRONT, GL_LINE)
glPolygonMode(GL_BACK, GL_LINE)
Wireframe=True
elif Wireframe ==True:
glPolygonMode(GL_FRONT, GL_FILL)
glPolygonMode(GL_BACK, GL_FILL)
Wireframe=False
else:pass
elif args[0]==b"\x1b":
exit()
elif args[0]==b"v":
rquad=2
print(rquad)

print(args[0])

def main():
global window
glutInit()
glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE | GLUT_DEPTH)
glutInitWindowSize(640, 480)
glutInitWindowPosition(0, 0)
window = glutCreateWindow(b"Cube")
glutDisplayFunc(DrawGLScene)
glutIdleFunc(DrawGLScene)
glutReshapeFunc(ReSizeGLScene)
glutKeyboardFunc(keyPressed)
InitGL(640, 480)
glutMainLoop()
print("Press any key to exit")
main()