TypeError：initial_value必须是str还是none，而不是python 3中的字节？

Question

Here is my code:

import imaplib
from email.parser import HeaderParser
conn = imaplib.IMAP4_SSL('imap.gmail.com')
conn.login('example@gmail.com', 'password')
conn.select()
conn.search(None, 'ALL')
data = conn.fetch('1', '(BODY[HEADER])')
header_data = data[1][0][1]
parser = HeaderParser()
msg = parser.parsestr(header_data)

From this i get the error message:

TypeError: initial_value must be str or none, not bytes

Im using python 3 which apparently automatically decodes. So why am i still getting this error message?

Answer 1

你可以试试：

header_data = data[1][0][1].decode('utf-8')

Answer 2

I would suggest do this,(Python 3)

typ, data = conn.fetch('1', '(RFC822)') # will read the first email
email_content = data[0][1] 
msg = email.message_from_bytes(email_content) # this needs to be corrected in your case 
emailDate =  msg["Date"]
emaiSubject = msg["Subject"]

Answer 3

在这种情况下，您可能希望使用BytesHeaderParser 。