#!/usr/bin/python
#-*- coding:utf-8 -*-
import email
# from email.parser import Parser
def decode_email_header(header, sep=''):
	l = []
	for s, c in header:
		if c:
			l.append(s.decode(c))
		else:
			l.append(s)
	return sep.join(l)
s = email.Header.decode_header('"=?gb18030?B?bWFpbGZvcnRlc3R0?=" <2070776562@qq.com>')
print decode_email_header(s)
s = email.Header.decode_header('=?gb18030?B?bWFpbGZvcnRlc3R0?= <2070776562@qq.com>')
print decode_email_header(s)