利用python将文件转换为utf8 无BOM

如何将一个文件，转换为utf8 无BOM的文件呢；这里使用python做了实现

这里有一个细节超级有意思；data[:1024]就在data的实际长度小于1024的情况，也能分片成功！

#!/usr/bin/env python# -*- coding: utf-8 -*-###########################################################   A clever person solves a problem. A wise person avoids it#   Please call Me programming devil.########################################################## #import osimport codecsimport chardetdef convUtf8File(src_file,tgt_file,again=0):    print "input:",src_file    if not os.path.exists(src_file):        print "not exits:",src_file        return    data=""    with open(src_file,'r') as f:        data=f.read()    r=chardet.detect(data[:1024])    print "detect:",r    e= r['encoding']    if  e=='utf-8':        with codecs.open(tgt_file, 'w') as f:            f.write(data)        print "OK!"        return    if again==0:        print "save as:", tgt_file        with codecs.open(tgt_file,'w') as f:            f.write(data)        print "go on.."        convUtf8File(tgt_file,tgt_file,1)        return    data = data.decode(e, 'ignore')    with codecs.open(tgt_file, 'w', 'utf-8') as f:        f.write(data)    with open(tgt_file, 'r') as f:        data = f.read()    r = chardet.detect(data[:1024])    print "final detect:", r    print "OK!"convUtf8File(r'D:\data\TestData\xiaoshuo\test.txt',r'D:\data\TestData\xiaoshuo\res.txt')