"Fossies" - the Fresh Open Source Software Archive

Member "spambayes-1.1a6/README-DEVEL.txt" (23 Feb 2009, 31896 Bytes) of archive /windows/mail/spambayes-1.1a6.zip:

As a special service "Fossies" has tried to format the requested source page into HTML format (assuming markdown format). Alternatively you can here view or download the uninterpreted source code file. A member file download can also be achieved by clicking within a package contents listing on the according byte size field.

Copyright © 2002-2009 Python Software Foundation; All Rights Reserved

The Python Software Foundation (PSF) holds copyright on all material in this project. You may use it under the terms of the PSF license; see LICENSE.txt.

Assorted clues.

What’s Here?

Lots of mondo cool partially documented code. What else could there be ?

The focus of this project so far has not been to produce the fastest or smallest filters, but to set up a flexible pure-Python implementation for doing algorithm research. Lots of people are making fast/small implementations, and it takes an entirely different kind of effort to make genuine algorithm improvements. I think we’ve done quite well at that so far. The focus of this codebase may change to small/fast later – as is, the false positive rate has gotten too small to measure reliably across test sets with 4000 hams + 2750 spams, and the f-n rate has also gotten too small to measure reliably across that much training data.

The code in this project requires Python 2.2 (or later).

You should definitely check out the FAQ: http://spambayes.org/faq.html

Getting Source Code

The SpamBayes project source code is hosted at SourceForge (http://spambayes.sourceforge.net/). Access is via Subversion.

Running Unit Tests

SpamBayes has a currently incomplete set of unit tests, not all of which pass, due, in part, to bit rot. We are working on getting the unit tests to run using the nose <http://somethingaboutorange.com/mrl/projects/nose/>_ package. After downloading and installing nose, you can run the current unit tests on Unix-like systems like so from the SpamBayes top-level directory::

TMPDIR=/tmp BAYESCUSTOMIZE= nosetests -v . 2>&1 \
| sed -e "s:$(pwd)/::" \
      -e "s:$(python -c 'import sys ; print sys.exec_prefix')/::" \
| tee failing-unit-tests.txt

The file, failing-unit-tests.txt, is checked into the Subversion repository at the top level using Python from Subversion (currently 2.7a0). You can look at it for any failing unit tests and work to get them passing, or write new tests.

Primary Core Files

Options.py Uses ConfigParser to allow fiddling various aspects of the classifier, tokenizer, and test drivers. Create a file named bayescustomize.ini to alter the defaults. Modules wishing to control aspects of their operation merely do

    from Options import options

near the start, and consult attributes of options.  To see what options
are available, import Options.py and do

    print Options.options.display_full()

This will print out a detailed description of each option, the allowed
values, and so on.  (You can pass in a section or section and option
name to display_full if you don't want the whole list).

As an alternative to bayescustomize.ini, you can set the environment
variable BAYESCUSTOMIZE to a list of one or more .ini files, these will
be read in, in order, and applied to the options. This allows you to
tweak individual runs by combining fragments of .ini files.  The
character used to separate different .ini files is platform-dependent.
On Unix, Linux and Mac OS X systems it is ':'.  On Windows it is ';'.
On Mac OS 9 and earlier systems it is a NL character.

classifier.py The classifier, which is the soul of the method.

tokenizer.py An implementation of tokenize() that Tim can’t seem to help but keep working on . Generates a token stream from a message, which the classifier trains on or predicts against.

chi2.py A collection of statistics functions.


sb_filter.py A simpler hammie front-end that doesn’t print anything. Useful for procmail filtering and scoring from your MUA.

sb_mboxtrain.py Trainer for Maildir, MH, or mbox mailboxes. Remembers which messages it saw the last time you ran it, and will only train on new messages or messages which should be retrained.

The idea is to run this automatically every night on your Inbox and
Spam folders, and then sort misclassified messages by hand.  This
will work with any IMAP4 mail client, or any client running on the

sb_server.py A spam-classifying POP3 proxy. It adds a spam-judgment header to each mail as it’s retrieved, so you can use your email client’s filters to deal with them without needing to fiddle with your email delivery system.

Also acts as a web server providing a user interface that allows you
to train the classifier, classify messages interactively, and query
the token database.  This piece may at some point be split out into
a separate module.

If the appropriate options are set, also serves a message training
SMTP proxy.  It sits between your email client and your SMTP server
and intercepts mail to set ham and spam addresses.
All other mail is simply passed through to the SMTP server.

sb_mailsort.py A delivery agent that uses a CDB of word probabilities and delivers a message to one of two Maildir message folders, depending on the classifier score. Note that both Maildirs must be on the same device.

sb_xmlrpcserver.py A stab at making hammie into a client/server model, using XML-RPC.

sb_client.py A client for sb_xmlrpcserver.py.

sb_imapfilter.py A spam-classifying and training application for use with IMAP servers. You can specify folders that contain mail to train as ham/spam, and folders that contain mail to classify, and the filter will do so.

Test Driver Core

Tester.py A test-driver class that feeds streams of msgs to a classifier instance, and keeps track of right/wrong percentages and lists of false positives and false negatives.

TestDriver.py A flexible higher layer of test helpers, building on Tester above. For example, it’s usable for building simple test drivers, NxN test grids, and N-fold cross-validation drivers. See also rates.py, cmp.py, and table.py below.

msgs.py Some simple classes to wrap raw msgs, and to produce streams of msgs. The test drivers use these.

Concrete Test Drivers

mboxtest.py A concrete test driver like timtest.py, but working with a pair of mailbox files rather than the specialized timtest setup.

timcv.py An N-fold cross-validating test driver. Assumes “a standard” data directory setup (see below)) rather than the specialized mboxtest setup. N classifiers are built. 1 run is done with each classifier. Each classifier is trained on N-1 sets, and predicts against the sole remaining set (the set not used to train the classifier). mboxtest does the same. This (or mboxtest) is the preferred way to test when possible: it makes best use of limited data, and interpreting results is straightforward.

timtest.py A concrete test driver like mboxtest.py, but working with “a standard” test data setup (see below). This runs an NxN test grid, skipping the diagonal. N classifiers are built. N-1 runs are done with each classifier. Each classifier is trained on 1 set, and predicts against each of the N-1 remaining sets (those not used to train the classifier). This is a much harder test than timcv, because it trains on N-1 times less data, and makes each classifier predict against N-1 times more data than it’s been taught about. It’s harder to interpret the results of timtest (than timcv) correctly, because each msg is predicted against N-1 times overall. So, e.g., one terribly difficult spam or ham can count against you N-1 times.

Test Utilities

rates.py Scans the output (so far) produced by TestDriver.Drive(), and captures summary statistics.

cmp.py Given two summary files produced by rates.py, displays an account of all the f-p and f-n rates side-by-side, along with who won which (etc), the change in total # of unique false positives and negatives, and the change in average f-p and f-n rates.

table.py Summarizes the high-order bits from any number of summary files, in a compact table.

fpfn.py Given one or more TestDriver output files, prints list of false positive and false negative filenames, one per line.

Test Data Utilities

cleanarch.py A script to repair mbox archives by finding “Unix From” lines that should have been escaped, and escaping them.

unheader.py A script to remove unwanted headers from an mbox file. This is mostly useful to delete headers which incorrectly might bias the results. In default mode, this is similar to ‘spamassassin -d’, but much, much faster.

loosecksum.py A script to calculate a “loose” checksum for a message. See the text of the script for an operational definition of “loose”.

rebal.py Evens out the number of messages in “standard” test data folders (see below). Needs generalization (e.g., Ham and 4000 are hardcoded now).

mboxcount.py Count the number of messages (both parseable and unparseable) in mbox archives.

split.py splitn.py Split an mbox into random pieces in various ways. Tim recommends using “the standard” test data set up instead (see below).

splitndirs.py Like splitn.py (above), but splits an mbox into one message per file in “the standard” directory structure (see below). This does an approximate split; rebal.py (above) can be used afterwards to even out the number of messages per folder.

runtest.sh A Bourne shell script (for Unix) which will run some test or other. I (Neale) will try to keep this updated to test whatever Tim is currently asking for. The idea is, if you have a standard directory structure (below), you can run this thing, go have some tea while it works, then paste the output to the SpamBayes list for good karma.

Standard Test Data Setup

Barry gave Tim mboxes, but the spam corpus he got off the web had one spam per file, and it only took two days of extreme pain to realize that one msg per file is enormously easier to work with when testing: you want to split these at random into random collections, you may need to replace some at random when testing reveals spam mistakenly called ham (and vice versa), etc – even pasting examples into email is much easier when it’s one msg per file (and the test drivers make it easy to print a msg’s file path).

The directory structure under my spambayes directory looks like so:

Data/ Spam/ Set1/ (contains 1375 spam .txt files) Set2/ “” Set3/ “” Set4/ “” Set5/ “” Set6/ “” Set7/ “” Set9/ “” Set9/ “” Set10/ “” reservoir/ (contains “backup spam”) Ham/ Set1/ (contains 2000 ham .txt files) Set2/ “” Set3/ “” Set4/ “” Set5/ “” Set6/ “” Set7/ “” Set8/ “” Set9/ “” Set10/ “” reservoir/ (contains “backup ham”)

Every file at the deepest level is used (not just files with .txt extensions). The files don’t need to have a “Unix From” header before the RFC-822 message (i.e. a line of the form “From


If you use the same names and structure, huge mounds of the tedious testing code will work as-is. The more Set directories the merrier, although you want at least a few hundred messages in each one. The “reservoir” directories contain a few thousand other random hams and spams. When a ham is found that’s really spam, move it into a spam directory, then use the rebal.py utility to rebalance the Set directories moving random message(s) into and/or out of the reservoir directories. The reverse works as well (finding ham in your spam directories).

The hams are 20,000 msgs selected at random from a python-list archive. The spams are essentially all of Bruce Guenter’s 2002 spam archive:


The sets are grouped into pairs in the obvious way: Spam/Set1 with Ham/Set1, and so on. For each such pair, timtest trains a classifier on that pair, then runs predictions on each of the other pairs. In effect, it’s a NxN test grid, skipping the diagonal. There’s no particular reason to avoid predicting against the same set trained on, except that it takes more time and seems the least interesting thing to try.

Later, support for N-fold cross validation testing was added, which allows more accurate measurement of error rates with smaller amounts of training data. That’s recommended now. timcv.py is to cross-validation testing as the older timtest.py is to grid testing. timcv.py has grown additional arguments to allow using only a random subset of messages in each Set.

CAUTION: The partitioning of your corpora across directories should be random. If it isn’t, bias creeps in to the test results. This is usually screamingly obvious under the NxN grid method (rates vary by a factor of 10 or more across training sets, and even within runs against a single training set), but harder to spot using N-fold c-v.

Testing a change and posting the results

(Adapted from clues Tim posted on the spambayes and spambayes-dev lists)

Firstly, setup your data as above; it’s really not worth the hassle to come up with a different scheme. If you use the Outlook plug-in, the export.py script in the Outlook2000 directory will export all the spam and ham in your ‘training’ folders for you into this format (or close enough).

Basically the idea is that you should have 10 sets of data, each with 200 to 500 messages in them. Obviously if you’re testing something to do with the size of a corpus, you’ll want to change that. You then want to run timcv.py -n 10 > std.txt (call std.txt whatever you like), and then rates.py std.txt You end up with two files, std.txt, which has the raw results, and stds.txt, which has more of a summary of the results.

Now make the change to the code or options, and repeat the process, giving the files different names (note that rates.py will automatically choose the name for the output file, based on the input one).

You’ve now got the data you need, but you have to interpret it. The simplest way of all is just to post it to spambayes-dev@python.org and let someone else do it for you . The data you should post is the output of cmp.py stds.txt alts.txt along with the output of table.py stds.txt alts.txt (note that these just print to stdout).

Other information you can find in the ‘raw’ output (std.txt, above) are histograms of the ham/spam spread, and a copy of the options settings.

Interpreting cmp.py output

(Using an example from Tim on spambayes-dev)

cv_octs.txt -> cv_oct_subjs.txt -> tested 488 hams & 897 spams against 1824 hams & 3501 spams -> tested 462 hams & 863 spams against 1850 hams & 3535 spams -> tested 475 hams & 863 spams against 1837 hams & 3535 spams -> tested 430 hams & 887 spams against 1882 hams & 3511 spams -> tested 457 hams & 888 spams against 1855 hams & 3510 spams -> tested 488 hams & 897 spams against 1824 hams & 3501 spams -> tested 462 hams & 863 spams against 1850 hams & 3535 spams -> tested 475 hams & 863 spams against 1837 hams & 3535 spams -> tested 430 hams & 887 spams against 1882 hams & 3511 spams -> tested 457 hams & 888 spams against 1855 hams & 3510 spams

false positive percentages 0.000 0.000 tied 0.000 0.000 tied 0.000 0.000 tied 0.000 0.000 tied 0.219 0.219 tied

won 0 times tied 5 times lost 0 times

So all 5 runs tied on FP. That tells us much more than that the net effect across 5 runs was nil on FP: it tells us that there are no hidden glitches hiding behind that “net nothing” – it was no change across the board.

total unique fp went from 1 to 1 tied mean fp % went from 0.0437636761488 to 0.0437636761488 tied

false negative percentages 2.007 2.007 tied 1.390 1.390 tied 1.622 1.622 tied 2.029 1.917 won -5.52% 2.703 2.477 won -8.36%

won 2 times tied 3 times lost 0 times

When evaluating a small change, I’m heartened to see that in no run did it lose. At worst it tied, and twice it helped a little. That’s encouraging.

What the histograms would tell us that we can’t tell from this is whether you could have done just as well without the change by raising your ham cutoff a little. That would also tie on FP, and may also get rid of the same number (or even more) of FN.

total unique fn went from 86 to 83 won -3.49% mean fn % went from 1.95029003772 to 1.88269707836 won -3.47%

ham mean ham sdev 0.57 0.58 +1.75% 4.63 4.77 +3.02% 0.08 0.07 -12.50% 1.20 1.01 -15.83% 0.36 0.29 -19.44% 3.61 3.23 -10.53% 0.08 0.11 +37.50% 0.89 1.18 +32.58% 0.72 0.76 +5.56% 6.80 7.06 +3.82%

ham mean and sdev for all runs 0.37 0.37 +0.00% 4.10 4.16 +1.46%

That’s a good example of grand averages hiding the truth: the averaged change in the mean ham score was 0 across all 5 runs, but within the 5 runs it slobbered around wildly, from decreasing 20% to increasing 40%(!).

spam mean spam sdev 96.43 96.44 +0.01% 15.89 15.89 +0.00% 97.01 97.07 +0.06% 13.79 13.70 -0.65% 97.14 97.16 +0.02% 14.05 14.02 -0.21% 96.52 96.56 +0.04% 15.65 15.52 -0.83% 95.53 95.63 +0.10% 17.47 17.31 -0.92%

spam mean and sdev for all runs 96.52 96.57 +0.05% 15.46 15.37 -0.58%

That’s good to see: it’s a consistent win for spam scores across runs, although an almost imperceptible one. It’s good when the mean spam score rises, and it’s good when sdev (for ham or spam) decreases.

ham/spam mean difference: 96.15 96.20 +0.05

This is a slight win for the chance, although seeing the details gives cause to worry some about the effect on ham: the ham sdev increased overall, and the effects on ham mean and ham sdev varied wildly across runs. OTOH, the “before” numbers for ham mean and ham sdev varied wildly across runs already. That gives cause to worry some about the data .

Making a source release

Source releases are built with distutils. Here’s how I (Richie) have been building them. I do this on a Windows box, partly so that the zip release can have Windows line endings without needing to run a conversion script. I don’t think that’s actually necessary, because everything would work on Windows even with Unix line endings, but you couldn’t load the files into Notepad and sometimes it’s convenient to do so. End users might not even have any other text editor, so it make things like the README unREADable. 8-)

Anthony would rather eat live worms than trying to get a sane environment on Windows, so his approach to building the zip file is at the end.

o If any new file types have been added since last time (eg. 1.0a5 went out without the Windows .rc and .h files) then add them to MANIFEST.in. If there are any new scripts or packages, add them to setup.py. Test these changes (by building source packages according to the instructions below) then commit your edits. o Checkout the ‘spambayes’ module twice, once with Windows line endings and once with Unix line endings (I use WinCVS for this, using “Admin / Preferences / Globals / Checkout text files with the Unix LF”. If you use TortoiseCVS, like Tony, then the option is on the Options tab in the checkout dialog). o Change spambayes/init.py to contain the new version number but don’t commit it yet, just in case something goes wrong. o Note that if you cheated above, and used an existing checkout, you need to ensure that you don’t have extra files in there. For example, if you have a few thousand email messages in testtools/Data, setup.py will take a very long time. o In the Windows checkout, run “python setup.py sdist –formats zip” o In the Unix checkout, run “python setup.py sdist –formats gztar” o Take the resulting spambayes-1.0a5.zip and spambayes-1.0a5.tar.gz, and test the former on Windows (ideally in a freshly-installed Python environment; I keep a VMWare snapshot of a clean Windows installation for this, but that’s probably overkill 8-) and test the latter on Unix (a Debian VMWare box in my case). o If you can, rename these with “rc” at the end, and make them available to the spambayes-dev crowd as release candidates. If all is OK, then fix the names (or redo this) and keep going. o Dance the SourceForge release dance: http://sourceforge.net/docman/display_doc.php?docid=6445&group_id=1#filereleasesteps When it comes to the “what’s new” and the ChangeLog, I cut'n'paste the relevant pieces of WHAT_IS_NEW.txt and CHANGELOG.txt into the form, and check the “Keep my preformatted text” checkbox. o Now commit spambayes/init.py and tag the whole checkout - see the existing tag names for the tag name format. o In either checkout, run “python setup.py register” to register the new version with PyPI. o Update download.ht with checksums, links, and sizes for the files. From release 1.1 doing a “setup.py sdist” will generate checksums and sizes for you, and print out the results to stdout. o Create OpenPGP/PGP signatures for the files. Using GnuPG: % gpg -sab spambayes-1.0.1.zip % gpg -sab spambayes-1.0.1.tar.gz % gpg -sab spambayes-1.0.1.exe Put the created *.asc files in the “sigs” directory of the website. (Note that when you update the website, you will need to manually ssh to shell1.sourceforge.net and chmod these files so that people can access them.) o If your public key isn’t already linked to on the Download page, put it there. o Update the website News, Download and Windows sections. o Update reply.txt in the website repository as needed (it specifies the latest version). Then let Tim, Barry, Tony, or Skip know that they need to update the autoresponder. o Run “make install version” in the website directory to push the new version file, so that “Check for new version” works. o Add ‘+’ to the end of spambayes/init.py’s version, to differentiate CVS users, and check this change in. After a number of changes have been checked in, this can be incremented and have “a0” added to the end. For example, with a 1.1 release: [before the release process] ‘1.1rc1’ [during the release process] ‘1.1’ [after the release process] ‘1.1+’ [later] ‘1.2a0’

Then announce the release on the mailing lists and watch the bug reports roll in. 8-)

Anthony’s Alternate Approach to Building the Zipfile

o Unpack the tarball somewhere, making a spambayes-1.0a7 directory (version number will obviously change in future releases) o Run the following two commands:

 find spambayes-1.0a7 -type f -name '*.txt' | xargs zip -l sb107.zip 
 find spambayes-1.0a7 -type f \! -name '*.txt' | xargs zip sb107.zip 

o This makes a tarball where the .txt files are mangled, but everything else is left alone.

Making a binary release

The binary release includes both sb_server and the Outlook plug-in and is an installer for Windows (98 and above) systems. In order to have COM typelibs that work with Outlook 2000, 2002 and 2003, you need to build the installer on a system that has Outlook 2000 (not a more recent version). You also need to have InnoSetup, pywin32, resourcepackage and py2exe installed.

o Get hold of a fresh copy of the source (Windows line endings, presumably). o Run the setup.py file in the spambayes/Outlook2000/docs directory to generate the dynamic documentation. o Run sb_server and open the web interface. This gets resourcepackage to generate the needed files. o Replace the init.py file in spambayes/spambayes/resources with a blank file to disable resourcepackage. o Ensure that the version numbers in spambayes/spambayes/init.py and spambayes/spambayes/Version.py are up-to-date. o Ensure that you don’t have any other copies of spambayes in your PYTHONPATH, or py2exe will pick these up! If in doubt, run setup.py install. o Run the “setup_all.py” script in the spambayes/windows/py2exe/ directory. This uses py2exe to create the files that Inno will install. o Open (in InnoSetup) the spambayes.iss file in the spambayes/windows/ directory. Change the version number in the AppVerName and OutputBaseFilename lines to the new number. o Compile the spambayes.iss script to get the executable. o You can now follow the steps in the source release description above, from the testing step.

Making a translation

Note that it is, in general, best to translate against a stable version. This means you avoid having to repeatedly re-translate text as the code changes. This means code that has been released via the sourceforge system, that does not have a letter code at the end of the version (e.g. 1.0.1, 1.1.2, but not 1.0a1, 1.1b1, or 2.1rc2). If you do want to translate a more recent version, be sure to discuss your plans first on spambayes-dev so that you can be warned about any planned changes.

Translation is only feasible for 1.1 and above. No translation effort is planned for the 1.0.x series of releases.

To translate, you will need:

o A suitable version of Python (2.2 or greater) installed. See http://python.org/download

o A copy of the SpamBayes source that you wish to translate.

o Resourcepackage installed. See http://resourcepackage.sourceforge.net

Optional tools that may make translation easier include:

o A copy of VC++, Visual Studio, or some other GUI tool that allows editing of VC++ dialog resource files.

o A GUI HTML editor.

o A GUI gettext editor, such as poEdit. http://poedit.sourceforge.net


You will need to create a directory structure as follows:

spambayes/ # spambayes package directory # containing classifier.py, tokenizer.py, etc languages/ # root languages directory, # possibly already containing # other translations {lang_code}/ # directory for the specific # translation - {lang_code} is # described below DIALOGS/ # directory for Outlook plug-in # dialog resources, which should contain an # empty init.py file, so that py2exe can # include the directory LC_MESSAGES/ # directory for gettext managed # strings, which should also contain an # empty init.py file init.py # Copy of spambayes/spambayes/resources/init.py

Translation Tasks

There are four translation tasks:

o Documentation. This is the least exciting, but the most important. If the documentation is appropriately translated, then even if elements of the interface are not translated, users should be able to manage.

A method of managing translated documents has yet to be created. If you are interested in translating documentation, please contact spambayes-dev@python.org.

o Outlook dialogs. The majority of the Outlook plug-in interface is handled by a VC++/Visual Studio dialog resource file pair (dialogs.h and dialogs.rc). The plug-in code then manipulates this to create the actual dialog.

The easiest method of translating these dialogs is to use a tool like VC++ or Visual Studio. Simply open the ‘Outlook2000\dialogs\resources\dialogs.rc’ file, translate the dialog, and save the file as ‘spambayes\languages{lang_code}\DIALOGS\dialogs.rc’, where {lang_code} is the appropriate language code for the language you have translated into (e.g. ‘en_UK’, ‘es’, ‘de_DE’). If you do not have a GUI tool to edit the dialogs, simply open the dialogs.rc file in a text editor, manually change the appropriate strings, and save the file as above.

Once the dialogs are translated, you need to use the rc2py.py utility to create the i18n_dialogs.py file. For example, in the ‘Outlook2000\dialogs\resources’ directory: > rc2py.py {base}\spambayes\languages\de_DE\DIALOGS\dialogs.rc {base}\spambayes\languages\de_DE\DIALOGS\i18n_dialogs.py 1 Where {base} is the directory that contains the spambayes package directory. This should create a ‘i18n_dialogs.py’ in the same directory as your translated dialogs.rc file - this is the file the the Outlook plug-in uses.

o Web interface template file. The majority of the web interface is created by dynamic use of a HTML template file.

The easiest method of translating this file is to use a GUI HTML editor. Simply open the ‘spambayes/resources/ui.html’ file, translate it as described within, and save the file as ‘spambayes/languages/{lang_code}/i18n.ui.html’, where {lang_code} is the appropriate language code as described above. If you do not have a GUI HTML editor, or are happy editing HTML by hand, simply use your favority HTML editor to do this task.

Once the template file is created, resourcepackage will automatically create the required ui_html.py file when SpamBayes is run with that language selected.

o Gettext managed strings. The remainder of both the Outlook plug-in and the web interface are contained within the various Python files that make up SpamBayes. The Python gettext module (very similar to the GNU gettext system) is used to manage translation of these strings.

To translate these strings, use the translation template ‘spambayes/languages/messages.pot’. You can regenerate that file, if necessary, by running this command in the spambayes package directory: > {python dir}\tools\i18n\pygettext.py -o languages\messages.pot ..\contrib*.py ..\Outlook2000*.py ..\scripts*.py *.py ..\testtools*.py ..\utilities*.py ..\windows*.py

You may wish to use a GUI system to create the required messages.po file, such as poEdit, but you can also do this manually with a text editor. If your utility does not do it for you, you will also need to compile the .po file to a .mo file. The utility msgfmt.py will do this for you - it should be located ‘{python dir}\tools\i18n’.

Testing the translation

There are two ways to set the language that SpamBayes will use:

o If you are using Windows, change the preferred Windows language using the Control Panel.

o Get the ‘[globals] language’ SpamBayes option to a list of the preferred language(s).