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Challenge 224: Coffee Roast Detector

curriculum/challenges/english/blocks/daily-coding-challenges-python/69a890af247de743333bd4cd.md

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--description--

Given a string representing the beans used to make a cup of coffee, determine the roast of the cup.

  • The given string will contain the following characters, each representing a type of bean:

    • An apostrophe (') is a light roast bean worth 1 point each.
    • A dash (-) is a medium roast bean worth 2 points each.
    • A period (.) is a dark roast bean worth 3 points each.

  • The roast level is determined by the average of all the beans.

Return:

  • "Light" if the average is less than 1.75.
  • "Medium" if the average is 1.75 to 2.5.
  • "Dark" if the average is greater than 2.5.

--hints--

detect_roast("''-''''''-'-''--''''") should return "Light".

js
({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(detect_roast("''-''''''-'-''--''''"), "Light")`)
}})

detect_roast(".'-''-''..'''.-.-''-") should return "Medium".

js
({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(detect_roast(".'-''-''..'''.-.-''-"), "Medium")`)
}})

detect_roast("--.''--'-''.--..-.--") should return "Medium".

js
({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(detect_roast("--.''--'-''.--..-.--"), "Medium")`)
}})

detect_roast("-...'-......-..-...-") should return "Dark".

js
({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(detect_roast("-...'-......-..-...-"), "Dark")`)
}})

detect_roast(".--.-..-......----.'") should return "Medium".

js
({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(detect_roast(".--.-..-......----.'"), "Medium")`)
}})

detect_roast("..-..-..-..-....-.-.") should return "Dark".

js
({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(detect_roast("..-..-..-..-....-.-."), "Dark")`)
}})

detect_roast("-'-''''''..-'.''-'.'") should return "Light".

js
({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(detect_roast("-'-''''''..-'.''-'.'"), "Light")`)
}})

--seed--

--seed-contents--

py
def detect_roast(beans):

    return beans

--solutions--

py
def detect_roast(beans):
    total = 0

    for bean in beans:
        if bean == "'":
            total += 1
        elif bean == "-":
            total += 2
        elif bean == ".":
            total += 3

    avg = total / len(beans)

    if avg < 1.75:
        return "Light"
    elif avg <= 2.5:
        return "Medium"
    else:
        return "Dark"