#! /sw/bin/python
#http://www.cs.nyu.edu/courses/summer07/G22.2110-001/hw01-py-example.txt
import re, sys

"""Rename this script into "csv2fixed.py", and make it executable.
Put the following input data into a file called "operators.csv":

operator,precedence,arity,associativity,description
or,2,binary,left,Boolean OR
and,3,binary,left,Boolean AND
not x,4,unary,n/a,Boolean NOT
"in, not in",5,binary,left,Membership tests
"is, is not",6,binary,left,Identity tests
"<, <=, >, >=, <>, !=, ==",7,binary,chained,Comparisons
"""

if 1 == len(sys.argv):
    file = sys.stdin
elif 2 == len(sys.argv):
    file = open(sys.argv[1], 'r')
else:
    print 'usage: tables.py <file.cvs>'
    sys.exit(-1)

def read_table(file):
    table = [ ]
    while True:
        line = file.readline()
        if '' == line:
            break
	line = line.strip()
        match = re.findall(r'[^",][^,]*|"[^"]+"', line)
        row = [ ]
        for value in match:
            if '"' == value[0]:
                row.append(value[1:-1])
            else:
                row.append(value)
        table.append(row)
    return table

def write_table(table, file):
    widths = [ ]
    for row in table:
        for i in range(len(row)):
            while i >= len(widths):
                widths.append(0)
            width = len(row[i])
            if widths[i] < width:
                widths[i] = width
    for row in table:
        for i in range(len(row)):
            if 0 != i:
                 file.write(' ')
            file.write('%-*s' % (widths[i], row[i]))
        file.write('\n')

table = read_table(file)

write_table(table, sys.stdout)