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Challenge 24: Pangram

curriculum/challenges/english/blocks/daily-coding-challenges-python/6821ec02237de8297eaee79a.md

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--description--

Given a word or sentence and a string of lowercase letters, determine if the word or sentence uses all the letters from the given set at least once and no other letters.

  • Ignore non-alphabetical characters in the word or sentence.
  • Ignore letter casing in the word or sentence.

--hints--

is_pangram("hello", "helo") should return True

js
({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_pangram("hello", "helo"), True)`)
}})

is_pangram("hello", "hel") should return False

js
({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_pangram("hello", "hel"), False)`)
}})

is_pangram("hello", "helow") should return False

js
({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_pangram("hello", "helow"), False)`)
}})

is_pangram("hello world", "helowrd") should return True

js
({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_pangram("hello world", "helowrd"), True)`)
}})

is_pangram("Hello World!", "helowrd") should return True

js
({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_pangram("Hello World!", "helowrd"), True)`)
}})

is_pangram("Hello World!", "heliowrd") should return False

js
({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_pangram("Hello World!", "heliowrd"), False)`)
}})

is_pangram("freeCodeCamp", "frcdmp") should return False

js
({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_pangram("freeCodeCamp", "frcdmp"), False)`)
}})

is_pangram("The quick brown fox jumps over the lazy dog.", "abcdefghijklmnopqrstuvwxyz") should return True

js
({test: () => { runPython(`
from unittest import TestCase
TestCase().assertIs(is_pangram("The quick brown fox jumps over the lazy dog.", "abcdefghijklmnopqrstuvwxyz"), True)`)
}})

--seed--

--seed-contents--

py
def is_pangram(sentence, letters):

    return sentence

--solutions--

py
import re
def is_pangram(sentence, letters):
    used_letters = []
    for char in sentence.lower():
        if re.match(r'[a-z]', char) and char not in used_letters:
            used_letters.append(char)

    sorted_letters = ''.join(sorted(letters.lower()))
    sorted_used_letters = ''.join(sorted(used_letters))

    return sorted_letters == sorted_used_letters