justifying fields

In [23]: fieldnames = ('date','time','lat','long','depth','ml','eh','ev','rms','orid')

In [25]: s.rjust(50)
Out[25]: '                                   20081229 181330'

In [26]: fieldnames[0].rjust(15)
Out[26]: '           date'

In [27]: [ name.rjust(15) for name in fieldnames ]
Out[27]:
['           date',
 '           time',
 '            lat',
 '           long',
 '          depth',
 '             ml',
 '             eh',
 '             ev',
 '            rms',
 '           orid']

In [29]: ','.join([ name.rjust(10) for name in fieldnames ])
Out[29]: '      date,      time,       lat,      long,     depth,        ml,        eh,        ev,       rms,      orid'

In [31]: '\t'.join([ name.rjust(10) for name in fieldnames ])
Out[31]: '      date\t      time\t       lat\t      long\t     depth\t        ml\t        eh\t        ev\t       rms\t      orid'