1 files changed, 60 insertions, 60 deletions
diff --git a/Demo/tkinter/guido/electrons.py b/Demo/tkinter/guido/electrons.py
index 97dad2d733..fdc558f885 100755
--- a/Demo/tkinter/guido/electrons.py
+++ b/Demo/tkinter/guido/electrons.py
@@ -1,6 +1,6 @@
 #! /usr/bin/env python
 
-# Simulate "electrons" migrating across the screen.  
+# Simulate "electrons" migrating across the screen.
 # An optional bitmap file in can be in the background.
 #
 # Usage: electrons [n [bitmapfile]]
@@ -18,74 +18,74 @@ import random
 # The graphical interface
 class Electrons:
 
-	# Create our objects
-	def __init__(self, n, bitmap = None):
-		self.n = n
-		self.tk = tk = Tk()
-		self.canvas = c = Canvas(tk)
-		c.pack()
-		width, height = tk.getint(c['width']), tk.getint(c['height'])
-
-		# Add background bitmap
-		if bitmap:
-			self.bitmap = c.create_bitmap(width/2, height/2,
-						      bitmap=bitmap,
-						      foreground='blue')
-
-		self.pieces = []
-		x1, y1, x2, y2 = 10,70,14,74
-		for i in range(n):
-			p = c.create_oval(x1, y1, x2, y2, fill='red')
-			self.pieces.append(p)
-			y1, y2 = y1 +2, y2 + 2
-		self.tk.update()
-
-	def random_move(self, n):
-		c = self.canvas
-		for p in self.pieces:
-			x = random.choice(range(-2,4))
-			y = random.choice(range(-3,4))
-			c.move(p, x, y)
-		self.tk.update()
-
-	# Run -- allow 500 movemens
-	def run(self):
-		try:
-			for i in range(500):
-				self.random_move(self.n)
-		except TclError:
-			try:
-				self.tk.destroy()
-			except TclError:
-				pass
+    # Create our objects
+    def __init__(self, n, bitmap = None):
+        self.n = n
+        self.tk = tk = Tk()
+        self.canvas = c = Canvas(tk)
+        c.pack()
+        width, height = tk.getint(c['width']), tk.getint(c['height'])
+
+        # Add background bitmap
+        if bitmap:
+            self.bitmap = c.create_bitmap(width/2, height/2,
+                                          bitmap=bitmap,
+                                          foreground='blue')
+
+        self.pieces = []
+        x1, y1, x2, y2 = 10,70,14,74
+        for i in range(n):
+            p = c.create_oval(x1, y1, x2, y2, fill='red')
+            self.pieces.append(p)
+            y1, y2 = y1 +2, y2 + 2
+        self.tk.update()
+
+    def random_move(self, n):
+        c = self.canvas
+        for p in self.pieces:
+            x = random.choice(range(-2,4))
+            y = random.choice(range(-3,4))
+            c.move(p, x, y)
+        self.tk.update()
+
+    # Run -- allow 500 movemens
+    def run(self):
+        try:
+            for i in range(500):
+                self.random_move(self.n)
+        except TclError:
+            try:
+                self.tk.destroy()
+            except TclError:
+                pass
 
 
 # Main program
 def main():
-	import sys, string
+    import sys, string
 
-	# First argument is number of electrons, default 30
-	if sys.argv[1:]:
-		n = string.atoi(sys.argv[1])
-	else:
-		n = 30
+    # First argument is number of electrons, default 30
+    if sys.argv[1:]:
+        n = string.atoi(sys.argv[1])
+    else:
+        n = 30
 
-	# Second argument is bitmap file, default none
-	if sys.argv[2:]:
-		bitmap = sys.argv[2]
-		# Reverse meaning of leading '@' compared to Tk
-		if bitmap[0] == '@': bitmap = bitmap[1:]
-		else: bitmap = '@' + bitmap
-	else:
-		bitmap = None
+    # Second argument is bitmap file, default none
+    if sys.argv[2:]:
+        bitmap = sys.argv[2]
+        # Reverse meaning of leading '@' compared to Tk
+        if bitmap[0] == '@': bitmap = bitmap[1:]
+        else: bitmap = '@' + bitmap
+    else:
+        bitmap = None
 
-	# Create the graphical objects...
-	h = Electrons(n, bitmap)
+    # Create the graphical objects...
+    h = Electrons(n, bitmap)
 
-	# ...and run!
-	h.run()
+    # ...and run!
+    h.run()
 
 
 # Call main when run as script
 if __name__ == '__main__':
-	main()
+    main()