[Mailman-Developers] mailman error

[Barry A. Warsaw]

>>>>> "GM" == Gergely Madarasz <gorgo@caesar.elte.hu> writes:

    GM> Hello!

    GM> What does this mean ?

    GM> Feb 21 00:47:29 1999 mailcmd: Traceback (innermost last):
    GM> mailcmd: File "/var/lib/mailman/scripts/mailcmd", line 52, in
    GM> ?  mailcmd: list.ParseMailCommands() mailcmd: File
    GM> "/usr/lib/mailman/Mailman/MailCommandHandler.py", line 86, in
    GM> ParseMailCommands mailcmd: sender =
    GM> string.lower(mail.GetSender()) mailcmd: File
    GM> "/usr/lib/mailman/Mailman/Message.py", line 122, in GetSender
    GM> mailcmd: return string.lower(mail_address) mailcmd: TypeError
    GM> : read-only buffer, None

    GM> The mail command that triggered this message was a simple
    GM> subscribe request... with a bad From: header, though From:
    GM> Claudio Granatiero <@.>

Subscribing this type of address should no longer be allowed.

    GM> Btw wouldn't it be nice if these tracebacks printed out the
    GM> values of the variables, too ? :)

Well... In general, Guido discourages printing variable values in
tracebacks raised from builtin-functions, because all sorts of
problems can occur (recursive loops, errors in reprs).  What you see
here is the next best thing: the *type* of the variable is printed.
More often than not, a variable is None when you don't expect it to
be, as in the case above.  The type of None is <type 'None'> so
printing the type is usually all the information you need to figure
out the problem!

-Barry