Andrey Dugin

def find_max_fraction(ndsum):
    for numerator in range(ndsum - 1, 0, -1):
        denominator = ndsum - numerator
        if numerator % denominator > 0:
            return f'{numerator}/{denominator}'

from operator import itemgetter as ig

list(map(ig('name'), sorted(players, key=ig('score'))))

for i, table in enumerate(pd.read_html('http://www.statdata.ru/nasel_regions')):
    print('-' * 100, f'>>>{i}', table, sep='\n')

from functools import reduce
from operator import pow, add

# Вариант #1
print(reduce(lambda result, vals: result + [pow(sum(vals), 1/3)], zip(lst1, lst2), []))

# Вариант #2
print(list(map(lambda x: pow(x, 1/3), map(add, lst1, lst2))))

Performing list(d) on a dictionary returns a list of all the keys used in the dictionary, in insertion order (if you want it sorted, just use sorted(d) instead). To check whether a single key is in the dictionary, use the in keyword.

class Element:
    recipes = {
        ('Aqua', 'Air'): 'Storm',
        ('Aqua', 'Fire'): 'Steam',
        ('Aqua', 'Earth'): 'Dirt',
        ('Air', 'Fire'): 'Lightning',
        ('Air', 'Earth'): 'Dust',
        ('Fire', 'Earth'): 'Lava',
    }
    recipes.update({(b, a): c for (a, b), c in recipes.items()})
    classes = {a for a, b in recipes.keys()} | {*recipes.values()}
    
    @classmethod
    def __str__(cls):
        return cls.__name__

    def __add__(self, other):
        if isinstance(other, self.__class__):
            return self
        try:
            return eval(self.recipes[(str(self), str(other))])()
        except KeyError:
            return None

    
for cls in Element.classes:
    exec(f'class {cls}(Element): pass')

print(Air() + Aqua())

from collections import Counter
from operator import itemgetter

Counter(map(itemgetter('first_name'), students))

Counter(map(lambda student: student['first_name'], students))

def syllables(word, vowels=set('aeiou'), end='!'):
    word = iter(word + end)
    b, syllables = next(word), ''
    while b != end:
        a, b = b, next(word)
        syllables += a
        if (a in vowels) and (b not in vowels):
            syllables += ' '
    return syllables.split()
            
syllables('daabdhvoovuudpanda')