如果发布程序，不能去掉，要尊重作者的版权，这里所说的去掉仅仅是为了自己阅读examples代码的时候方便，ruby字符串处理比较方便，就用ruby了

#coding: utf-8

require 'find'

Find.find('/home/111/pyfiles/pyqt4_examples').to_a.keep_if{ |f| f.end_with?'.py' or f.end_with?'.pyw' }.each do |path|
  str = File.read(path)
  rstr = <<EOF
#############################################################################
##
## Copyright (C) 2010 Hans-Peter Jansen <hpj@urpla.net>.
## Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
## All rights reserved.
##
## This file is part of the examples of PyQt.
##
## $QT_BEGIN_LICENSE:LGPL$
## Commercial Usage
## Licensees holding valid Qt Commercial licenses may use this file in
## accordance with the Qt Commercial License Agreement provided with the
## Software or, alternatively, in accordance with the terms contained in
## a written agreement between you and Nokia.
##
## GNU Lesser General Public License Usage
## Alternatively, this file may be used under the terms of the GNU Lesser
## General Public License version 2.1 as published by the Free Software
## Foundation and appearing in the file LICENSE.LGPL included in the
## packaging of this file.  Please review the following information to
## ensure the GNU Lesser General Public License version 2.1 requirements
## will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
##
## In addition, as a special exception, Nokia gives you certain additional
## rights.  These rights are described in the Nokia Qt LGPL Exception
## version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
##
## GNU General Public License Usage
## Alternatively, this file may be used under the terms of the GNU
## General Public License version 3.0 as published by the Free Software
## Foundation and appearing in the file LICENSE.GPL included in the
## packaging of this file.  Please review the following information to
## ensure the GNU General Public License version 3.0 requirements will be
## met: http://www.gnu.org/copyleft/gpl.html.
##
## If you have questions regarding the use of this file, please contact
## Nokia at qt-info@nokia.com.
## $QT_END_LICENSE$
##
#############################################################################
EOF
  str.gsub!(rstr, '')
  str.gsub!('#coding: utf-8', '')
  str.gsub!('#!/usr/bin/env python', '')
  str.strip!
  str = "#coding: utf-8\n\n" + str
  open(path, 'w').puts(str)
end