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1¡¢strÀàÐÍ¿ÉÒÔÀí½âΪһ¸ö¶þ½øÖÆblock£¬»òmultibyte
2¡¢multibyte_str.decode("<multibyte_encode_method>")  -> unicode
3¡¢unicode_str.encode("<multibyte_encode_method>")  -> multibyte_str(binary block)
4¡¢unicode_str µÄ²Ù×÷²ÎÊýҲӦΪunicode£¬È磺unicode_str.find("Ñù±¾".decode("utf-8"))
5¡¢´úÂëÀïµÄuǰ׺»á×Ô¶¯Éú³Éunicode×Ö·û´®£¨Ëü¸ú¾ÝÔ´ÂëÊײ¿µÄ#coding:*** ¶ÎÀ´¾ö¶¨Ó¦¸ÃÔõÑùÓÉmultibyteÉú³Éunicode£©
6¡¢python µÄprint½«Êä³öbinary block¸øconsole£¬colsole½«ÓÃϵͳµÄmultibyte_encode_methodΪÏÔʾÕâЩbinary block
REF
http://blog.sina.com.cn/s/blog_620c017e0100erh8.html


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BaseException
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+--¡¡Exception
+--¡¡StopIteration
+--¡¡StandardError
|¡¡¡¡¡¡¡¡+--¡¡BufferError
|¡¡¡¡¡¡¡¡+--¡¡ArithmeticError
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PythonÖ®ÃÀ DecoratorÉîÈëÏê½â(Ò»)

There should be one—--and preferably only one –--obvious way to do it.
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python pop3 ÊÕÓʼþ

def retrive_emails(pop3_server, user_name, passwd, server_port):
    #POP3
    pop_client = poplib.POP3(pop3_server, port=server_port)
    pop_client.user(user_name)
    pop_client.pass_(passwd)
   
    ......

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#filename Seek.py
import unicodedata
import sys
import os
class Seek():
    """
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