[OT] nntp references, was re: pickling a dict

Discussion in 'Python' started by Dan Perl, Nov 3, 2004.

  1. Dan Perl

    Dan Perl Guest

    "andrea valle" <> wrote in message
    news:...

    >> First of all, your posting shows up as part of the "Newbie question"
    >> thread
    >> and not as a new thread. You probably replied or followed up to a
    >> posting
    >> in that thread and you only changed the subject line. Please don't do
    >> that.
    >>

    >
    > Yes, it's true. I'm really sorry. I didn't know about this fact. (Where
    > is these info about thread recorded??)


    Good question. I'm actually not familiar with NNTP, but looking at the
    properties of a message and at RFC 1036 (Standard for Interchange of USENET
    Messages, http://www.ietf.org/rfc/rfc1036.txt) I figure that that
    information is kept in the References field (an optional field) in the
    header:
    "This field lists the Message-ID's of any messages prompting the submission
    of this message. It is required for all follow-up messages, and forbidden
    when a new subject is raised. Implementations should provide a follow-up
    command, which allows a user to post a follow-up message. This command
    should generate a "Subject" line which is the same as the original message,
    except that if the original subject does not begin with "Re:" or "re:", the
    four characters "Re:" are inserted before the subject. If there is no
    "References" line on the original header, the "References" line should
    contain the Message-ID of the original message (including the angle
    brackets). If the original message does have a "References" line, the
    follow-up message should have a "References" line containing the text of the
    original "References" line, a blank, and the Message-ID of the original
    message.

    The purpose of the "References" header is to allow messages to be grouped
    into conversations by the user interface program. This allows conversations
    within a newsgroup to be kept together, and potentially users might shut off
    entire conversations without unsubscribing to a newsgroup. User interfaces
    need not make use of this header, but all automatically generated follow-ups
    should generate the "References" line for the benefit of systems that do use
    it, and manually generated follow-ups (e.g., typed in well after the
    original message has been printed by the machine) should be encouraged to
    include them as well.

    It is permissible to not include the entire previous "References" line if it
    is too long. An attempt should be made to include a reasonable number of
    backwards references."

    >> BTW, does your save( ) function also take minutes? If it takes much
    >> less
    >> than the open( ) function, my guess would be that pickle is not the
    >> problem.

    >
    > You're guessing fine: it takes much less. So effectively it should
    > depend on my other functions. I hadn't considered that.


    Make sure that those functions are the problem. Use the profiler
    (http://www.python.org/doc/lib/profile.html) or insert some statements
    showing the time like the ones I described before and find out where most of
    the processing time is spent. You should actually use the profiler at least
    eventually, when it will come to improving the performance of your
    functions.

    Dan
     
    Dan Perl, Nov 3, 2004
    #1
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