bpo-38539: Update demo files (GH-16890)

Tools/demo/README

 This directory contains a collection of demonstration scripts for
 various aspects of Python programming.
 
-beer.py        Well-known programming example: Bottles of beer.
-eiffel.py      Python advanced magic: A metaclass for Eiffel post/preconditions.
-hanoi.py       Well-known programming example: Towers of Hanoi.
-life.py        Curses programming: Simple game-of-life.
-markov.py      Algorithms: Markov chain simulation.
-mcast.py       Network programming: Send and receive UDP multicast packets.
-queens.py      Well-known programming example: N-Queens problem.
-redemo.py      Regular Expressions: GUI script to test regexes.
-rpython.py     Network programming: Small client for remote code execution.
-rpythond.py    Network programming: Small server for remote code execution.
-sortvisu.py    GUI programming: Visualization of different sort algorithms.
-ss1.py         GUI/Application programming: A simple spreadsheet application.
-vector.py      Python basics: A vector class with demonstrating special methods.
\ No newline at end of file
+beer.py           Well-known programming example: Bottles of beer.
+eiffel.py         Python advanced magic: A metaclass for Eiffel post/preconditions.
+hanoi.py          Well-known programming example: Towers of Hanoi.
+life.py           Curses programming: Simple game-of-life.
+markov.py         Algorithms: Markov chain simulation.
+mcast.py          Network programming: Send and receive UDP multicast packets.
+queens.py         Well-known programming example: N-Queens problem.
+redemo.py         Regular Expressions: GUI script to test regexes.
+rpython.py        Network programming: Small client for remote code execution.
+rpythond.py       Network programming: Small server for remote code execution.
+sortvisu.py       GUI programming: Visualization of different sort algorithms.
+spreadsheet.py    GUI/Application programming: A simple spreadsheet application.
+vector.py         Python basics: A vector class demonstrating special methods.

Tools/demo/hanoi.py

@@ -27,7 +27,7 @@ def hanoi(n, a, b, c, report):
 class Tkhanoi:
 
     # Create our objects
-    def __init__(self, n, bitmap = None):
+    def __init__(self, n, bitmap=None):
         self.n = n
         self.tk = tk = Tk()
         self.canvas = c = Canvas(tk)
@@ -77,7 +77,7 @@ class Tkhanoi:
 
     # Run -- never returns
     def run(self):
-        while 1:
+        while True:
             hanoi(self.n, 0, 1, 2, self.report)
             hanoi(self.n, 1, 2, 0, self.report)
             hanoi(self.n, 2, 0, 1, self.report)
@@ -94,7 +94,7 @@ class Tkhanoi:
 
         # Lift the piece above peg a
         ax1, ay1, ax2, ay2 = c.bbox(self.pegs[a])
-        while 1:
+        while True:
             x1, y1, x2, y2 = c.bbox(p)
             if y2 < ay1: break
             c.move(p, 0, -1)
@@ -103,7 +103,7 @@ class Tkhanoi:
         # Move it towards peg b
         bx1, by1, bx2, by2 = c.bbox(self.pegs[b])
         newcenter = (bx1+bx2)//2
-        while 1:
+        while True:
             x1, y1, x2, y2 = c.bbox(p)
             center = (x1+x2)//2
             if center == newcenter: break
@@ -114,7 +114,7 @@ class Tkhanoi:
         # Move it down on top of the previous piece
         pieceheight = y2-y1
         newbottom = by2 - pieceheight*len(self.pegstate[b]) - 2
-        while 1:
+        while True:
             x1, y1, x2, y2 = c.bbox(p)
             if y2 >= newbottom: break
             c.move(p, 0, 1)

Tools/demo/rpythond.py

@@ -29,7 +29,7 @@ def main():
         with conn:
             print('connection from', remotehost, remoteport)
             request = b''
-            while 1:
+            while True:
                 data = conn.recv(BUFSIZE)
                 if not data:
                     break

Tools/demo/sortvisu.py

@@ -444,7 +444,7 @@ def quicksort(array):
             array.wait(1000)
             left = first
             right = last
-            while 1:
+            while True:
                 array.message("Sweep right pointer")
                 right = right-1
                 array.show_right(right)
@@ -473,7 +473,7 @@ def quicksort(array):
         array.hide_partition()
 
 def demosort(array):
-    while 1:
+    while True:
         for alg in [quicksort, insertionsort, selectionsort, bubblesort]:
             randomize(array)
             alg(array)