how to avoid a lot of 'if' statments ?

[witch]

why does it execute choice 1,2,3 at a same time?

Use a list and write simply

politicians = [ryashko, poroh, yacenyuk, tymoshenko]

pol1 = (int(input('Хто буде бити ? (Виберіть цифру)\n')))
pol2 = (int(input('Кого будуть бити ? (Виберіть цифру\n')))

politicans[pol1 - 1].attack(politicians[pol2 - 1])

This also works, thanks for reply, I appericate it ! any idea on how to loop it, so the game doesnt end after one choice ?