ranking items in a list by user score

Question

basically trying to imitate this code in python to make code that ranks items based on the users input.

output 2 items from a list, ask user for which is better, add +1 score to that item, add -1 score to the other item, move on to next comparison.

new to coding, so i can understand basics but i don't understand the best way to do this.

import random
file = open('items.txt', 'r')
read = file.readlines()
modified = []
for line in read:
  if line[-1] == '\n':
    modified.append(line[:-1])
  else:
    modified.append(line)
for i in range (9999999):
  randomint1 = (random.randint(0,498))
  randomint2 = (random.randint(0,498))
  item1 = modified[randomint1]
  item2 = modified[randomint2]
  print (item1, '\n'+ item2)
  answer = input('item 1 or 2')

this is what i have so far, i don't know how i'd go about linking the list of items to a list of scores

ideally i could read the items in ranking of top to bottom, possibly in a created txt file with the name of items listed next to score? i'm not too sure.

any help is appreciated, thanks

suggest rewording some of the question to better explain 1. what you're trying to do 2. what's not working and 3. what you've tried without me having to watch a whole video. Is this correct as the problem? - given a file with a list of items, you're trying to get input from the console to have a user pick between 2 randomly selected items. Each item has a score which starts at 0 and when selected, the score increases by 1 and the unselected item's score decreases by 1. — ccchoy, Oct 21 '22 at 17:53

ccchoy · Answer 1 · 2022-10-21T17:48:28.820

Given a file where each line in the file is some str item label like:

Plate
Fork
Spoon

and you want to write a program that will read all of the items from the file and then continuously ask a user one or the other while keeping tally of those results in the form of a single score value per item which goes +1 or -1 depending on if it was chosen in each decision.

with open("items.txt", "r") as f:
    items = f.read().splitlines()  # removes the \n @ the end vs readlines() see https://stackoverflow.com/questions/12330522/how-to-read-a-file-without-newlines

item_scores = {item: 0 for item in items}  # could also use a `collections.defaultdict(int)`

while True:
    item_1, item_2 = randomly_select_two_items(items)
    raw_input = ""
    while raw_input not in {item_1, item_2}:
        raw_input = input(f"{item_1} or {item_2}? ")
    if raw_input == item_1:
        item_scores[item_1] += 1
        item_scores[item_2] -= 1
    else:
        item_scores[item_2] += 1
        item_scores[item_1] -= 1
    print(f"The highest scored item is: {max(item_scores, key=item_scores.get)}")

print("Good Bye")

For completeness sake, I left a stub above for randomly_select_two_items(items) - here's a possible implementation to consider vs what you have in your example:

def randomly_select_two_items(items: list):
    import random
    return random.sample(items, 2)

ranking items in a list by user score

1 Answers1