Python: как округлить до двух десятичных знаков

Функции и методы Python

–ú—ã —Ç–∞–∫–∂–µ –≤—ã–≤–æ–¥–∏–º –Ω–∞ –∫–æ–Ω—Å–æ–ª—å —Å—É–º–º—É, –∫–æ—Ç–æ—Ä—É—é –∫–∞–∂–¥—ã–π –¥—Ä—É–≥ –¥–æ–ª–∂–µ–Ω –≤–Ω–µ—Å—Ç–∏ –Ω–∞ —É–∂–∏–Ω:

81% —É—á–∞—Å—Ç–Ω–∏–∫–æ–≤ –∑–∞—è–≤–∏–ª–∏, —á—Ç–æ –æ–Ω–∏ —á—É–≤—Å—Ç–≤–æ–≤–∞–ª–∏ —Å–µ–±—è –±–æ–ª–µ–µ —É–≤–µ—Ä–µ–Ω–Ω–æ –≤ —Å–≤–æ–∏—Ö –ø–µ—Ä—Å–ø–µ–∫—Ç–∏–≤–∞—Ö —Ä–∞–±–æ—Ç—ã –≤ —Å—Ñ–µ—Ä–µ —Ç–µ—Ö–Ω–æ–ª–æ–≥–∏–π –ø–æ—Å–ª–µ –ø–æ—Å–µ—â–µ–Ω–∏—è –±—É—Ç–∫–µ–º–ø. –ù–∞–π–¥–∏—Ç–µ –ø–æ–¥—Ö–æ–¥ –∫ —É—á–µ–±–Ω–æ–º—É –ª–∞–≥–µ—Ä—é —Å–µ–≥–æ–¥–Ω—è.

–°—Ä–µ–¥–Ω–∏–π –≤—ã–ø—É—Å–∫–Ω–∏–∫ —É—á–µ–±–Ω–æ–≥–æ –ª–∞–≥–µ—Ä—è –ø–æ—Ç—Ä–∞—Ç–∏–ª –º–µ–Ω–µ–µ —à–µ—Å—Ç–∏ –º–µ—Å—è—Ü–µ–≤ –Ω–∞ –ø–µ—Ä–µ—Ö–æ–¥–Ω—É—é –∫–∞—Ä—å–µ—Ä—É, –æ—Ç –Ω–∞—á–∞–ª–∞ —É—á–µ–±–Ω–æ–≥–æ –ª–∞–≥–µ—Ä—è –¥–æ –ø–æ–∏—Å–∫–∞ —Å–≤–æ–µ–π –ø–µ—Ä–≤–æ–π —Ä–∞–±–æ—Ç—ã.

–ú—ã –∏—Å–ø–æ–ª—å–∑–æ–≤–∞–ª–∏ –≤—Å—Ç—Ä–æ–µ–Ω–Ω–∞—è —Ñ—É–Ω–∫—Ü–∏—è round () –¥–ª—è –æ–∫—Ä—É–≥–ª–µ–Ω–∏—è –∑–Ω–∞—á–µ–Ω–∏—è " cost_per_friend " –¥–æ –¥–≤—É—Ö –¥–µ—Å—è—Ç–∏—á–Ω—ã—Ö –∑–Ω–∞–∫–æ–≤. –ó–∞—Ç–µ–º –º—ã –∏—Å–ø–æ–ª—å–∑–æ–≤–∞–ª–∏ —Å—Ç—Ä–æ–∫—É –æ–±—ä–µ–¥–∏–Ω–µ–Ω–∏–µ –¥–ª—è —Å–æ–∑–¥–∞–Ω–∏—è —Å–æ–æ–±—â–µ–Ω–∏—è, –∫–æ—Ç–æ—Ä–æ–µ –º—ã –≤—ã–≤–æ–¥–∏–º –Ω–∞ –∫–æ–Ω—Å–æ–ª—å. –≠—Ç–æ —Å–æ–æ–±—â–µ–Ω–∏–µ —Å–æ–æ–±—â–∞–µ—Ç –Ω–∞–º, —Å–∫–æ–ª—å–∫–æ –∫–∞–∂–¥—ã–π –¥—Ä—É–≥ –¥–æ–ª–∂–µ–Ω –∑–∞–ø–ª–∞—Ç–∏—Ç—å –∑–∞ —Å–≤–æ–π –æ–±–µ–¥.

–ó–∞–ø—É—Å—Ç–∏—Ç–µ –Ω–∞—à –∫–æ–¥, —á—Ç–æ–±—ã —É–≤–∏–¥–µ—Ç—å, –∫–∞–∫ —Ä–∞–±–æ—Ç–∞–µ—Ç –Ω–∞—à–∞ —Ñ—É–Ω–∫—Ü–∏—è: < / p>

–ï—Å–ª–∏ –±—ã –º—ã —Ä–∞–∑–¥–µ–ª–∏–ª–∏ 64,92 –Ω–∞ —à–µ—Å—Ç—å –±–µ–∑ –æ–∫—Ä—É–≥–ª–µ–Ω–∏—è, —Ç–æ —É–≤–∏–¥–µ–ª–∏ –±—ã —á–∏—Å–ª–æ —Å –±–æ–ª—å—à–∏–º –∫–æ–ª–∏—á–µ—Å—Ç–≤–æ–º –¥–µ—Å—è—Ç–∏—á–Ω—ã—Ö –∑–Ω–∞–∫–æ–≤. –ù–∞—à –∫–æ–¥ —Ä–∞—Å—Å—á–∏—Ç—ã–≤–∞–µ—Ç, —á—Ç–æ –∫–∞–∂–¥—ã–π –¥—Ä—É–≥ –¥–æ–ª–∂–µ–Ω –∑–∞–ø–ª–∞—Ç–∏—Ç—å 10,82 –¥–æ–ª–ª–∞—Ä–∞ –∑–∞ —Å–≤–æ–π —É–∂–∏–Ω, –ø—É—Ç–µ–º –æ–∫—Ä—É–≥–ª–µ–Ω–∏—è —Ä–µ–∑—É–ª—å—Ç–∞—Ç–∞ –Ω–∞—à–µ–π —Å—É–º–º—ã –¥–µ–ª–µ–Ω–∏—è –¥–æ –¥–≤—É—Ö –¥–µ—Å—è—Ç–∏—á–Ω—ã—Ö –∑–Ω–∞–∫–æ–≤.

–û–∫—Ä—É–≥–ª–µ–Ω–∏–µ —á–∏—Å–µ–ª —Å –ø–æ–º–æ—â—å—é —Ñ–æ—Ä–º–∞—Ç–∏—Ä–æ–≤–∞–Ω–∏—è —Å—Ç—Ä–æ–∫–∏

–í –Ω–∞—à–µ–º –ø–æ—Å–ª–µ–¥–Ω–µ–º –ø—Ä–∏–º–µ—Ä–µ –º—ã –ø–æ–∫–∞–∑–∞–ª–∏ –æ–∫—Ä—É–≥–ª–µ–Ω–Ω–æ–µ —á–∏—Å–ª–æ –≤ —Å—Ç—Ä–æ–∫–µ. –ï—Å—Ç—å –µ—â–µ –æ–¥–∏–Ω —Å–ø–æ—Å–æ–± –æ–∫—Ä—É–≥–ª–µ–Ω–∏—è —á–∏—Å–ª–∞, –µ—Å–ª–∏ –µ–≥–æ –µ–¥–∏–Ω—Å—Ç–≤–µ–Ω–Ω–∞—è —Ü–µ–ª—å - –ø–æ–∫–∞–∑–∞—Ç—å —Å—Ç—Ä–æ–∫—É. –≠—Ç–æ—Ç –º–µ—Ç–æ–¥ –ø–æ–¥–¥–µ—Ä–∂–∏–≤–∞–µ—Ç—Å—è —Ç–æ–ª—å–∫–æ –≤ Python 3.x.

–ú—ã –ø–µ—Ä–µ—Å–º–∞—Ç—Ä–∏–≤–∞–µ–º –Ω–∞—à –∫–æ–¥, —á—Ç–æ–±—ã –æ–∫—Ä—É–≥–ª–∏—Ç—å –∑–Ω–∞—á–µ–Ω–∏–µ, –∫–æ—Ç–æ—Ä–æ–µ –∫–∞–∂–¥—ã–π –¥—Ä—É–≥ –¥–æ–ª–∂–µ–Ω –∑–∞–ø–ª–∞—Ç–∏—Ç—å –∑–∞ —É–∂–∏–Ω, –∏—Å–ø–æ–ª—å–∑—É—è .format () —Å–∏–Ω—Ç–∞–∫—Å–∏—Å —Ñ–æ—Ä–º–∞—Ç–∏—Ä–æ–≤–∞–Ω–∏—è —Å—Ç—Ä–æ–∫–∏ .

–ù–∞—á–Ω–µ–º —Å —Ä–∞—Å—á–µ—Ç–∞, —Å–∫–æ–ª—å–∫–æ –¥–æ–ª–∂–µ–Ω –∑–∞–ø–ª–∞—Ç–∏—Ç—å –∫–∞–∂–¥—ã–π –¥—Ä—É–≥:

–ó–∞—Ç–µ–º –Ω–∞–ø–∏—à–∏—Ç–µ –∏–Ω—Å—Ç—Ä—É–∫—Ü–∏—é print (), –∫–æ—Ç–æ—Ä–∞—è —Å–æ–æ–±—â–∞–µ—Ç –Ω–∞–º, —Å–∫–æ–ª—å–∫–æ –∫–∞–∂–¥—ã–π –¥—Ä—É–≥ –¥–æ–ª–∂–µ–Ω –∑–∞–ø–ª–∞—Ç–∏—Ç—å –∑–∞ –æ–±–µ–¥. –ú—ã –∏—Å–ø–æ–ª—å–∑—É–µ–º –æ–ø–µ—Ä–∞—Ç–æ—Ä .format () —Å –æ–ø–µ—Ä–∞—Ç–æ—Ä–æ–º print (). –≠—Ç–æ –ø–æ–∑–≤–æ–ª—è–µ—Ç –Ω–∞–º —Ñ–æ—Ä–º–∞—Ç–∏—Ä–æ–≤–∞—Ç—å –∑–Ω–∞—á–µ–Ω–∏—è –≤–Ω—É—Ç—Ä–∏ –Ω–∞—à–µ–π —Å—Ç—Ä–æ–∫–∏:

–ù–∞—à–∞ –∏–Ω—Å—Ç—Ä—É–∫—Ü–∏—è .format () –∏—Å–ø–æ–ª—å–∑—É–µ—Ç —Å–ª–µ–¥—É—é—â–∏–π —Å–∏–Ω—Ç–∞–∫—Å–∏—Å –¥–ª—è —Å–æ–∑–¥–∞–Ω–∏—è –¥–µ—Å—è—Ç–∏—á–Ω–æ–≥–æ –ø—Ä–µ–¥—Å—Ç–∞–≤–ª–µ–Ω–∏—è —á–∏—Å–ª–∞, –æ–∫—Ä—É–≥–ª–µ–Ω–Ω–æ–≥–æ –¥–æ –¥–≤—É—Ö –∑–Ω–∞–∫–æ–≤. :

–î–≤–æ–µ—Ç–æ—á–∏–µ (:) —Å–æ–æ–±—â–∞–µ—Ç –Ω–∞—à–µ–º—É –∫–æ–¥—É, —á—Ç–æ –º—ã —Ö–æ—Ç–∏–º –æ—Ç—Ñ–æ—Ä–º–∞—Ç–∏—Ä–æ–≤–∞—Ç—å –∑–Ω–∞—á–µ–Ω–∏–µ. –ù–æ–ª—å –∏—Å–ø–æ–ª—å–∑—É–µ—Ç—Å—è –¥–ª—è —Ç–æ–≥–æ, —á—Ç–æ–±—ã Python –∑–Ω–∞–ª, —á—Ç–æ –º—ã –∏–º–µ–µ–º –¥–µ–ª–æ —Å —á–∏—Å–ª–æ–º, –∫–æ—Ç–æ—Ä–æ–µ –º–æ–∂–µ—Ç –±—ã—Ç—å –¥–æ–ø–æ–ª–Ω–µ–Ω–æ –Ω—É–ª—è–º–∏. .2 —É–∫–∞–∑—ã–≤–∞–µ—Ç Python –æ–∫—Ä—É–≥–ª–∏—Ç—å –Ω–∞—à–µ —á–∏—Å–ª–æ –¥–æ –¥–≤—É—Ö –¥–µ—Å—è—Ç–∏—á–Ω—ã—Ö –∑–Ω–∞–∫–æ–≤. –ó–Ω–∞—á–æ–∫ " f " –ø–æ–∫–∞–∑—ã–≤–∞–µ—Ç –Ω–∞—à–µ –∑–Ω–∞—á–µ–Ω–∏–µ –≤ –≤–∏–¥–µ —á–∏—Å–ª–∞.