diff --git a/Demo/pysvr/pysvr.py b/Demo/pysvr/pysvr.py
index a62fc5c..dd0abdc 100755
--- a/Demo/pysvr/pysvr.py
+++ b/Demo/pysvr/pysvr.py
@@ -14,30 +14,30 @@
 
 import sys, os, string, getopt, thread, socket, traceback
 
-PORT = 4000				# Default port
+PORT = 4000                             # Default port
 
 def main():
     try:
-	opts, args = getopt.getopt(sys.argv[1:], "")
-	if len(args) > 1:
-	    raise getopt.error, "Too many arguments."
+        opts, args = getopt.getopt(sys.argv[1:], "")
+        if len(args) > 1:
+            raise getopt.error, "Too many arguments."
     except getopt.error, msg:
-	usage(msg)
+        usage(msg)
     for o, a in opts:
-	pass
+        pass
     if args:
-	try:
-	    port = string.atoi(args[0])
-	except ValueError, msg:
-	    usage(msg)
+        try:
+            port = string.atoi(args[0])
+        except ValueError, msg:
+            usage(msg)
     else:
-	port = PORT
+        port = PORT
     main_thread(port)
 
 def usage(msg=None):
     sys.stdout = sys.stderr
     if msg:
-	print msg
+        print msg
     print "\n", __doc__,
     sys.exit(2)
 
@@ -47,18 +47,18 @@
     sock.listen(5)
     print "Listening on port", port, "..."
     while 1:
-	(conn, addr) = sock.accept()
-	if addr[0] != conn.getsockname()[0]:
-	    conn.close()
-	    print "Refusing connection from non-local host", addr[0], "."
-	    continue
-	thread.start_new_thread(service_thread, (conn, addr))
-	del conn, addr
+        (conn, addr) = sock.accept()
+        if addr[0] != conn.getsockname()[0]:
+            conn.close()
+            print "Refusing connection from non-local host", addr[0], "."
+            continue
+        thread.start_new_thread(service_thread, (conn, addr))
+        del conn, addr
 
 def service_thread(conn, addr):
     (caddr, cport) = addr
     print "Thread %s has connection from %s.\n" % (str(thread.get_ident()),
-						   caddr),
+                                                   caddr),
     stdin = conn.makefile("r")
     stdout = conn.makefile("w", 0)
     run_interpreter(stdin, stdout)
@@ -67,57 +67,57 @@
 def run_interpreter(stdin, stdout):
     globals = {}
     try:
-	str(sys.ps1)
+        str(sys.ps1)
     except:
-	sys.ps1 = ">>> "
+        sys.ps1 = ">>> "
     source = ""
     while 1:
-	stdout.write(sys.ps1)
-	line = stdin.readline()
-	if line[:2] == '\377\354':
-	    line = ""
-	if not line and not source:
-	    break
-	if line[-2:] == '\r\n':
-	    line = line[:-2] + '\n'
-	source = source + line
-	try:
-	    code = compile_command(source)
-	except SyntaxError, err:
-	    source = ""
-	    traceback.print_exception(SyntaxError, err, None, file=stdout)
-	    continue
-	if not code:
-	    continue
-	source = ""
-	try:
-	    run_command(code, stdin, stdout, globals)
-	except SystemExit, how:
-	    if how:
-		try:
-		    how = str(how)
-		except:
-		    how = ""
-		stdout.write("Exit %s\n" % how)
-	    break
+        stdout.write(sys.ps1)
+        line = stdin.readline()
+        if line[:2] == '\377\354':
+            line = ""
+        if not line and not source:
+            break
+        if line[-2:] == '\r\n':
+            line = line[:-2] + '\n'
+        source = source + line
+        try:
+            code = compile_command(source)
+        except SyntaxError, err:
+            source = ""
+            traceback.print_exception(SyntaxError, err, None, file=stdout)
+            continue
+        if not code:
+            continue
+        source = ""
+        try:
+            run_command(code, stdin, stdout, globals)
+        except SystemExit, how:
+            if how:
+                try:
+                    how = str(how)
+                except:
+                    how = ""
+                stdout.write("Exit %s\n" % how)
+            break
     stdout.write("\nGoodbye.\n")
 
 def run_command(code, stdin, stdout, globals):
-	save = sys.stdin, sys.stdout, sys.stderr
-	try:
-	    sys.stdout = sys.stderr = stdout
-	    sys.stdin = stdin
-	    try:
-		exec code in globals
-	    except SystemExit, how:
-		raise SystemExit, how, sys.exc_info()[2]
-	    except:
-		type, value, tb = sys.exc_info()
-		if tb: tb = tb.tb_next
-		traceback.print_exception(type, value, tb)
-		del tb
-	finally:
-	    sys.stdin, sys.stdout, sys.stderr = save
+    save = sys.stdin, sys.stdout, sys.stderr
+    try:
+        sys.stdout = sys.stderr = stdout
+        sys.stdin = stdin
+        try:
+            exec code in globals
+        except SystemExit, how:
+            raise SystemExit, how, sys.exc_info()[2]
+        except:
+            type, value, tb = sys.exc_info()
+            if tb: tb = tb.tb_next
+            traceback.print_exception(type, value, tb)
+            del tb
+    finally:
+        sys.stdin, sys.stdout, sys.stderr = save
 
 from code import compile_command