I have a strange/minor problem in a Python program I use for mail
filtering.
One of the ways it classifies messages is by searching for a specific
string in square brackets [] in the Subject:, the section of code that
does this is:-
#
#
# copy the fields from the filter configuration file into better named
variables
#
nm = fld[0] # name/alias
dd = fld[1] + "/" # destination directory
tocc = fld[2].lower() # list address
sbstrip = '[' + fld[3] + ']' # string to match in and/or strip out
of subject
#
#
# see if the filter To/CC column matches the message To: or Cc: or if
sbstrip is in Subject:
#
if (tocc in msgcc or tocc in msgto or sbstrip in msgsb):
#
#
# set the destination directory
#
dest = mldir + dd + nm
#
#
# Strip out list name (4th field) from subject if it's there
#
if sbstrip in msgsb:
msg.replace_header("Subject", msgsb.replace(sbstrip, ''))
#
#
# we've found a match so assume we won't get another
#
break
So in the particular case where I have a problem sbstrip is "[Ipswich
Recycle]" and the Subject: is "[SPAM] [Ipswich Recycle] OFFER:
Lawnmower (IP11)". The match isn't found, presumably because 'in' is
greedy and sees "[SPAM] [Ipswich Recycle]" which isn't a match for
"[Ipswich Recycle]".
Other messages with "[Ipswich Recycle]" in the Subject: are being
found and filtered correctly, it seems that it's the presence of the
"[SPAM]" in the Subject: that's breaking things.
Is this how 'in' should work, it seems a little strange if so, not
intuitively how one would expect 'in' to work. ... and is there any
way round the issue except by recoding a separate test for the
particular string search where this can happen?
--
Chris Green
ยท
--
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