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Update from prev. version solution in Clear category for The Most Wanted Letter by Pumba_UA
from string import ascii_lowercase
from operator import itemgetter
from collections import OrderedDict
def checkio(text):
# Create a list of tuples (ascii_lowercase_index, n)
val = [(ascii_lowercase[i], v) for i, v in
enumerate(map(lambda x: text.lower().count(x), ascii_lowercase))]
d = {}
for l, n in (filter(lambda x: x[1], sorted(val, key=itemgetter(1)))):
if n not in d.keys():
d[n] = l
else:
d[n] = d[n] + l
return list(OrderedDict(sorted(d.items())).values())[-1][0]
if __name__ == '__main__':
#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. 28, 2015
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