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Solution by Counter solution in Clear category for The Most Wanted Letter by slchangtw
from collections import Counter
def checkio(text: str) -> str:
clean_text = [c for c in text.lower() if c.isalpha()]
most_wanted_letter = sorted(Counter(clean_text).most_common(), key=lambda x: (-x[1], x[0]))[0][0]
return most_wanted_letter
if __name__ == '__main__':
print("Example:")
print(checkio("Hello World!"))
#These "asserts" using only for self-checking and not necessary for auto-testing
assert checkio("Hello World!") == "l", "Hello test"
assert checkio("How do you do?") == "o", "O is most wanted"
assert checkio("One") == "e", "All letter only once."
assert checkio("Oops!") == "o", "Don't forget about lower case."
assert checkio("AAaooo!!!!") == "a", "Only letters."
assert checkio("abe") == "a", "The First."
print("Start the long test")
assert checkio("a" * 9000 + "b" * 1000) == "a", "Long."
print("The local tests are done.")
June 29, 2022
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