自动收取邮件的python代码出错，求高手指教

[hollin1988]

我想用邮件写个自动收取邮件，然后自动下到本机的python代码，但是在写入文件的时候，老是自动报错，我要把报错的地方注释掉，就不能写内容。求教高手

# -*- coding: cp936 -*-
import   poplib
import   cStringIO
import   email
import   base64
import   os

pop3_server = 'pop.163.com'
user_name = '[e-mail]'
password = 'XXXX'
#POP3取信
M = poplib.POP3(pop3_server)
M.user(user_name)
M.pass_(password)
#打印有多少封信
numMessages = len(M.list()[1])
print ('num of messages', numMessages)
    
for i in range(numMessages):
    m = M.retr(i+1)
    buf = cStringIO.StringIO()
    for j in m[1]:
        print >> buf, j
        buf.seek(0)
#解析信件内容
        msg = email.message_from_file(buf)
        for part in msg.walk():
            contenttype = part.get_content_type()
            filename = part.get_filename()
            if contenttype == 'application/octet-stream':
                if filename == None:
                    continue
                #   保存附件
                f   =   open( "mail%d_%s.attach" % (i+1,filename), 'wb')
                f.write(base64.decodestring(part.get_payload()))
                f.close()
            elif contenttype == 'text/plain':
                #   保存正文
                f = open( "mail%d.eml " % (i+1), 'wb')
                f.write(base64.decodestring(part.get_payload()))
                f.close()

出错信息是：
Traceback (most recent call last):
File "C:\Users\Administrator\Desktop\任务\邮件库\getEmail.py", line 40, in <module>
f.write(base64.decodestring(part.get_payload()))
File "C:\Python26\lib\base64.py", line 321, in decodestring
return binascii.a2b_base64(s)
Error: Incorrect padding

[hollin1988]

[Quote=引用 4 楼 的回复:]

这个错误说明你要解码的字符串中有错误的填充字符、或者非字母字符，
http://stackoverflow.com/questions/2941995/python-ignore-incorrect-padding-error-when-base64-decoding
[/Quote]


那请问怎么解决呢？

[Gloveing]

[Quote=引用 5 楼 的回复:]

引用 4 楼 的回复:

这个错误说明你要解码的字符串中有错误的填充字符、或者非字母字符，
http://stackoverflow.com/questions/2941995/python-ignore-incorrect-padding-error-when-base64-decoding



那请问怎么解决呢？
[/Quote]
链接里有解决思路：
http://stackoverflow.com/questions/2941995/python-ignore-incorrect-padding-error-when-base64-decoding

[Gloveing]

f.write(base64.decodestring(part.get_payload())) =》

f.write(base64.b64decode(part.get_payload())) 试试？

[hollin1988]

[Quote=引用 1 楼 的回复:]

f.write(base64.decodestring(part.get_payload())) =》

f.write(base64.b64decode(part.get_payload())) 试试？
[/Quote]

试了报这个错误:
Traceback (most recent call last):
File "C:\Users\Administrator\Desktop\任务\邮件库\getEmail.py", line 40, in <module>
f.write(base64.b64decode(part.get_payload()))
File "C:\Python26\lib\base64.py", line 76, in b64decode
raise TypeError(msg)
TypeError: Incorrect padding

[bugs2k]

def processMsg(entire_msg):
    body = ''
    msg = email.message_from_string(entire_msg)
    if msg.is_multipart():
        for part in msg.walk():
            if part.get_content_type() == 'text/plain':
                body = part.get_payload()
                break
            else:
                body = msg.get_payload(decode=True)
    else:
        body = msg.get_payload(decode=True)
    return body

[Gloveing]

这个错误说明你要解码的字符串中有错误的填充字符、或者非字母字符，
http://stackoverflow.com/questions/2941995/python-ignore-incorrect-padding-error-when-base64-decoding