On 2/17/2021 10:40 AM, Chris Green wrote:
I'm running this using Python 3.7 on a Linux system.
Most of the time (i.e. for a couple of days now) the program has been
satifactorily delivering mail messages, hundreds of them. However one
mail message has provoked the following error:-
chris@cheddar$ tail mail.err
Traceback (most recent call last):
File "/home/chris/.mutt/bin/filter.py", line 95, in <module>
if sbstrip in msghdr["subject"]:
TypeError: argument of type 'Header' is not iterable
But msghdr["subject"] is surely just a string isn't it?
Obviously not.
Why is it
complaining about something of type 'Header'?
Because you tried to iterate it. Header is defined in email.header
(find 'class Header'). It has a __str__ to turn one into a string. I
have never read the email doc so I have no idea if 'subject' being a
Header is a bug.
Grepping email package for case-sensitive word 'Header' also returns 3
comment saying that something might be a Header, so stringify it. I
have the impression that these might have been added after the original
code, perhaps in response to error reports. In any case, you can do the
same.
As I said the program has been running happily for a couple of days
with no errors, I guess it must be something strange in a mail that
has broken things - but what?
To determine that, look at (after logging or saving) the raw email and
maybe the resulting Message (using msg.as_string).
# Read the message from standard input and make a message object from it
#
msg = mailbox.MaildirMessage(sys.stdin.buffer.read())
raw = sys.stdin.buffer.read() # So can save
msg = mailbox.MaildirMessage(raw)
msghdr["subject"] = msg.get("Subject", "unknown")
...
if sbstrip in msghdr["subject"]:
Replace with
sub = msghdr["subject"]
if 'Header' in str(sub.__class__):
# Or import email.message.class and use isinstance
# stringify or skip or ???
else:
msg.replace_header("Subject", msghdr["subject"].replace(sbstrip,
--
Terry Jan Reedy
--
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