[Python-bugs-list] [ python-Bugs-594893 ] printing email object deletes whitespace

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Bugs item #594893, was opened at 2002-08-13 23:59
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Category: Python Library
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Skip Montanaro (montanaro)
Assigned to: Barry A. Warsaw (bwarsaw)
Summary: printing email object deletes whitespace

Initial Comment:
I certain situations when printing email Message objects (I think), 
whitespace in headers disappears.  The attached zip file 
demonstrates this problem.  In email.orig, there is a line break 
followed by a TAB in the X-Vm-v5-Data header at the end of the 
first continuation line.  In email.new, which was generated by 
printing an email.Message object, the line break and TAB are gone, 
but no SPACE was inserted in their place.

This example is from a larger program which reads in a Unix 
mailbox like so:

    msgdict = {}
    i = 0
    for msg in mailbox.PortableUnixMailbox(f,
                                 email.Parser.Parser().parse):
        subj = msg["subject"]
        item = msgdict.get(subj) or []
        item.append((i, msg))
        msgdict[subj] = item
        i += 1

runs through msgdict and deletes a bunch of messages matching 
various criteria, then prints out those which remain retaining the 
relative order they had in the original mailbox:

    msglist = []
    for val in msgdict.values():
        msglist.extend(val)
    msglist.sort()
    for i,msg in msglist:
        print msg

email.orig was plucked from the input mailbox and email.new from 
the output mailbox.


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