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2 lines of internal functions solution in Clear category for The Most Wanted Letter by RJPython
def checkio(text: str) -> str:
## a is a sorted list of all letters (alpha) in small (casefold)
a = sorted([x.casefold() for x in text if x.isalpha()])
## looks for first maximum in a, uses KEY of how many there are (count)
return max(a, key=a.count)
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.")
Aug. 31, 2020
