#!/usr/bin/env python

# ***** BEGIN LICENSE BLOCK *****
# Version: MPL 1.1/GPL 2.0/LGPL 2.1
# 
# The contents of this file are subject to the Mozilla Public License Version
# 1.1 (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
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# Software distributed under the License is distributed on an "AS IS" basis,
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# The Original Code is mozilla.org code.
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# The Initial Developer of the Original Code is
# Mozilla.org.
# Portions created by the Initial Developer are Copyright (C) 2010
# the Initial Developer. All Rights Reserved.
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# Contributor(s):
#     Jeff Hammel <jhammel@mozilla.com>     (Original author)
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# either of the GNU General Public License Version 2 or later (the "GPL"),
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def format_tabular(table, spacer=' '):
    columns = [0 for i in range(max([len(row) for row in table]))]
    assert (len(columns) == min([len(row) for row in table]))
    for row in table:
        for index, column in enumerate(row):
            if len(column) > columns[index]:
                columns[index] = len(column)
    format_string = spacer.join(['%s%s' for i in range(len(columns))])
    retval = []
    for row in table:
        values = []
        for index, column in enumerate(row):
            values.append(column)
            values.append(' ' * (columns[index] - len(column)))
        retval.append(format_string % tuple(values))
    return '\n'.join(retval)

if __name__ == '__main__':
    test_data = [ ['fox', 'i am a fox!', 'Foxkeh'],
                  ['cat', 'meow', 'Lilly'],
                  ['elephant', 'elephants shower with their trunks', 'Elephino'] ]
    print format_tabular(test_data)