freecodecamp--freecodecamp/curriculum/challenges/english/blocks/daily-coding-challenges-python/69a890af247de743333bd4d2.md

id, title, challengeType, dashedName

id	title	challengeType	dashedName
69a890af247de743333bd4d2	Challenge 229: Truncate the Text 2	29	challenge-229

--description--

Given a string, return a new string that is truncated so that the total width of the characters does not exceed 50 units.

Each character has a specific width:

Letters	Width
"ilI"	1
"fjrt"	2
"abcdeghkmnopqrstuvwxyzJL"	3
"ABCDEFGHKMNOPQRSTUVWXYZ"	4

The table above includes all upper and lower case letters. Additionally:

• Spaces (" ") have a width of 2

• Periods (".") have a width of 1

• If the given string is 50 units or less, return the string as-is, otherwise

• Truncate the string and add three periods at the end ("...") so its total width, including the three periods, is as close as possible to 50 units without going over.

--hints--

truncate_text("The quick brown fox") should return "The quick brown f...".

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(truncate_text("The quick brown fox"), "The quick brown f...")`)
}})

truncate_text("The silky smooth sloth") should return "The silky smooth s...".

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(truncate_text("The silky smooth sloth"), "The silky smooth s...")`)
}})

truncate_text("THE LOUD BRIGHT BIRD") should return "THE LOUD BRIG...".

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(truncate_text("THE LOUD BRIGHT BIRD"), "THE LOUD BRIG...")`)
}})

truncate_text("The fast striped zebra") should return "The fast striped z...".

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(truncate_text("The fast striped zebra"), "The fast striped z...")`)
}})

truncate_text("The big black bear") should return "The big black bear".

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(truncate_text("The big black bear"), "The big black bear")`)
}})

--seed--

--seed-contents--

def truncate_text(s):

    return s

--solutions--

def truncate_text(s):
    MAX_WIDTH = 50
    ELLIPSIS = "..."
    ELLIPSIS_WIDTH = 3
    TRUNCATE_LIMIT = MAX_WIDTH - ELLIPSIS_WIDTH

    char_groups = {
        "ilI.": 1,
        "fjrt ": 2,
        "abcdeghkmnopqrstuvwxyzJL": 3,
        "ABCDEFGHKMNOPQRSTUVWXYZ": 4
    }

    def get_char_width(char):
        for key, width in char_groups.items():
            if char in key:
                return width
        return 3

    def string_width(string):
        total = 0
        for char in string:
            total += get_char_width(char)
        return total

    if string_width(s) <= MAX_WIDTH:
        return s

    result = ""
    total_width = 0

    for char in s:
        char_width = get_char_width(char)

        if total_width + char_width > TRUNCATE_LIMIT:
            break

        result += char
        total_width += char_width

    return result + ELLIPSIS