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#!/usr/bin/env python3
from sys import argv
def int2card(num, dim=4):
if num != int(num):
raise Exception("Number must be an integer.")
if num < 0:
raise Exception("Number must be nonnegative.")
if num >= 3**dim:
raise Exception("Number must be less than {}.".format(3**dim))
strlist = []
for i in range(dim):
strlist.append(str(num%3))
num //= 3
return ''.join(reversed(strlist))
def main():
"""Reverses the card identities in a capset.out file.
222 becomes 000, etc.
By default, reads in capset.out and writes to capset.new
You may give other input/output files as optional arguments.
It will NOT reverse in-place: you must give a different output file.
"""
inname = "capset.out"
outname = "capset.new"
if len(argv) == 2:
inname = argv[1]
if len(argv) == 3:
inname = argv[1]
outname = argv[2]
if inname == outname:
raise Exception("Input and output files must differ!")
infile = open(inname, "r")
outfile = open(outname, "w")
firstline = infile.readline()
infile.seek(0)
capset = firstline[1:-2].split(" ")
dim = len(capset[0])
for line in infile:
capset = line[1:-2].split(" ")
newcards = []
for card in capset:
newcard = 3**dim - 1 - int(card, 3)
newcards.append(int2card(newcard, dim))
outfile.write("[" + " ".join(newcards) + "]\n")
infile.close()
outfile.close()
if __name__ == "__main__": main()
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