to_fixed_width.py

# encoding: utf-8

import unicodedata
import csv
import sys

wt = { 'W':2, 'A':2 }

encoding = 'UTF-8'

def len_in_eaw(s):
    retval = 0
    for c in s:
        retval += wt.get(unicodedata.east_asian_width(c), 1)
    return retval

def main():
    rows = []
    mlen = []
    for cols in csv.reader(sys.stdin):
        cols = [unicode(col, encoding) for col in cols]
        rows.append(cols)
        if len(mlen) < len(cols):
            mlen += [0] * (len(cols) - len(mlen))
        for i, col in enumerate(cols):
            mlen[i] = max(mlen[i], len_in_eaw(col))

    for cols in rows:
        for i in range(0, len(mlen)):
            print '-' * mlen[i],
        print

        for i in range(0, len(mlen)):
            col = cols[i] if i < len(cols) else u''
            print (col + (u' ' * (mlen[i] - len_in_eaw(col)))).encode(encoding),
        print


if __name__ == '__main__':
    main()