Randomly Draw Players.py

# -*- coding: utf-8 -*-
# Python 3

# Randomly Draw Players

import sys
import pathlib
import random

if len(sys.argv) < 2:
    raise Exception("Missing argument: input_file_name")

script_file_name = sys.argv[0]
input_file_path = pathlib.Path(sys.argv[1])

with open(file=str(input_file_path.absolute()),
    mode='r',
    buffering=-1,
    encoding='utf-8'
) as input_file: # {

    players_dict = dict()
    input_file.lineno = 0

    for input_line in input_file: # {
        input_file.lineno += 1
        try:
            player_name, player_id = input_line.strip().split('\t')
        except ValueError:
            raise Exception("File error {!r} at line {}!".format( input_file_path.name, input_file.lineno ))
        else:
            players_dict.update({player_name: player_id})
    # }

# } with open

if not len(players_dict):
    raise Exception("Missing players")

output_file_path = input_file_path

i = 0
while output_file_path.exists(): # { Find an no-existing file name
    i += 1
    output_file_path = pathlib.Path( # Folder + name_base + name_extension
        input_file_path.parent,
        input_file_path.stem + " output {}".format(i) + input_file_path.suffix
    )
# }

with open(file=str(output_file_path.absolute()),
    mode='w',
    buffering=-1,
    encoding='utf-8'
) as output_file: # {

    while len(players_dict): # { Extract randomly each players
        player_chosen_name = random.choice(list(players_dict.keys())) # Choose randomly a player name
        player_chosen_id = players_dict.pop(player_chosen_name) # Extract and remove from dictionary
        output_file.writelines( "{}\t{}\n".format(player_chosen_name, player_chosen_id) )
    # }

# } with open