Longest names without repeated letter in WCA.

# this program and the extract of the wca export must be in the same folder
# to run, just type "python program.py"

# longest name without repeated letters

import csv

name_list = []
size_list = []
n = 100 # number of people to show
flag = False

with open('WCA_export_Persons.tsv','rb') as tsvin:
    tsvin = csv.reader(tsvin, delimiter='\t')

    for line in tsvin:
        name = line[2]
        latin = "" # latin letters only
        for x in name:
            if "a"<=x.lower()<="z":
                latin += x
        if len(latin.lower()) == len(set(latin.lower())):
            name_list += [name]
            size_list += [len(latin)]

    count = 0
    position = 1
    previous = 0
    for x, y in sorted(zip(size_list, name_list))[::-1]:
        if count >= n and x != previous:
            break
        print (str(position).zfill(3) if previous != x else "----"), x, y
        count += 1
        previous = x
        position += 1

print "\nWCA has", len(name_list), "people with no repeated letter."