Merge pull request #8 from einarf/pep8-run

Pep8 run

Author: jonwright

demo.py

@@ -6,45 +6,46 @@
 """
 
 import sys, math, time
-if sys.version_info[0] < 3 :
+if sys.version_info[0] < 3:
     from Tkinter import Tk, YES, BOTH
 else:
     from tkinter import Tk, YES, BOTH
 from OpenGL import GL, GLU
 from pyopengltk import OpenGLFrame
 
+
 class AppOgl(OpenGLFrame):
 
     def initgl(self):
-        GL.glViewport( 0, 0, self.width, self.height)
-        GL.glClearColor(1.0,1.0,1.0,0.0)
-        GL.glColor3f(0.0,0.0, 0.0)
+        GL.glViewport(0, 0, self.width, self.height)
+        GL.glClearColor(1.0, 1.0, 1.0, 0.0)
+        GL.glColor3f(0.0, 0.0, 0.0)
         GL.glPointSize(4.0)
         GL.glMatrixMode(GL.GL_PROJECTION)
         GL.glLoadIdentity()
-        GLU.gluOrtho2D(-5,5,-5,5)
+        GLU.gluOrtho2D(-5, 5, -5, 5)
         self.start = time.time()
         self.nframes = 0
-    
 
     def redraw(self):
         GL.glClear(GL.GL_COLOR_BUFFER_BIT)
         GL.glBegin(GL.GL_POINTS)
         npt = 100
         for i in range(npt):
-            x = -5.0 + i*10.0/npt 
-            y = math.sin(x+ time.time())*5/2
-            GL.glVertex2f( x, y )
+            x = -5.0 + i * 10.0 / npt
+            y = math.sin(x + time.time())*5/2
+            GL.glVertex2f(x, y)
         GL.glEnd()
         GL.glFlush()
-        self.nframes+=1
+        self.nframes += 1
         tm = time.time() - self.start
-        print("fps",self.nframes / tm, end="\r" )
+        print("fps", self.nframes / tm, end="\r")
+
 
 if __name__ == '__main__':
     root = Tk()
     app = AppOgl(root, width=320, height=200)
     app.pack(fill=BOTH, expand=YES)
-    app.animate=1
+    app.animate = 1
     app.after(100, app.printContext)
     app.mainloop()