Python: инициализировать список размера N
Функции и методы Python
Michael Zippo
27.11.2021
–í—ã –Ω–µ –º–æ–∂–µ—Ç–µ –Ω–∞–∑–Ω–∞—á–∞—Ç—å —ç–ª–µ–º–µ–Ω—Ç—ã –≤ —Å–ø–∏—Å–æ–∫ –≤ –ø–æ–∑–∏—Ü–∏—è—Ö, –∫–æ—Ç–æ—Ä—ã–µ –Ω–µ —Å—É—â–µ—Å—Ç–≤—É—é—Ç. –≠—Ç–æ —Å–≤—è–∑–∞–Ω–æ —Å —Ç–µ–º, —á—Ç–æ —Å–ø–∏—Å–∫–∏ –∏–Ω–¥–µ–∫—Å–∏—Ä—É—é—Ç—Å—è —Å –Ω—É–ª—è, –∞ –Ω–æ–≤—ã–µ –ø–æ–∑–∏—Ü–∏–∏ –∏–Ω–¥–µ–∫—Å–∞ —É–≤–µ–ª–∏—á–∏–≤–∞—é—Ç—Å—è –Ω–∞ –µ–¥–∏–Ω–∏—Ü—É –∫–∞–∂–¥—ã–π —Ä–∞–∑, –∫–æ–≥–¥–∞ —ç–ª–µ–º–µ–Ω—Ç –¥–æ–±–∞–≤–ª—è–µ—Ç—Å—è –≤ —Å–ø–∏—Å–æ–∫.
–≠—Ç–æ –æ–∑–Ω–∞—á–∞–µ—Ç, —á—Ç–æ –≤—ã —Ö–æ—Ç–∏—Ç–µ –¥–æ–±–∞–≤–∏—Ç—å —ç–ª–µ–º–µ–Ω—Ç—ã –≤ –æ–ø—Ä–µ–¥–µ–ª–µ–Ω–Ω—É—é –ø–æ–∑–∏—Ü–∏—é –≤ —Å–ø–∏—Å–∫–µ , –≤ —ç—Ç–æ–π –ø–æ–∑–∏—Ü–∏–∏ –¥–æ–ª–∂–Ω–æ –±—ã—Ç—å –∑–Ω–∞—á–µ–Ω–∏–µ-–∑–∞–ø–æ–ª–Ω–∏—Ç–µ–ª—å.
–í —ç—Ç–æ–º —Ä—É–∫–æ–≤–æ–¥—Å—Ç–≤–µ –º—ã –æ–±—Å—É–¥–∏–º, –∫–∞–∫ –∏–Ω–∏—Ü–∏–∞–ª–∏–∑–∏—Ä–æ–≤–∞—Ç—å —Å–ø–∏—Å–æ–∫ —Ä–∞–∑–º–µ—Ä–æ–º n
–≤ Python. –ú—ã —Ä–∞—Å—Å–º–æ—Ç—Ä–∏–º –ø—Ä–∏–º–µ—Ä —Ç–æ–≥–æ, –∫–∞–∫ —ç—Ç–æ —Å–¥–µ–ª–∞—Ç—å, —á—Ç–æ–±—ã –≤—ã –º–æ–≥–ª–∏ –∏–Ω–∏—Ü–∏–∞–ª–∏–∑–∏—Ä–æ–≤–∞—Ç—å —Å–ø–∏—Å–∫–∏ —Å –Ω–µ—Å—Ç–∞–Ω–¥–∞—Ä—Ç–Ω—ã–º–∏ —Ä–∞–∑–º–µ—Ä–∞–º–∏ –≤ —Å–≤–æ–∏—Ö –ø—Ä–æ–≥—Ä–∞–º–º–∞—Ö.
Python: –∏–Ω–∏—Ü–∏–∞–ª–∏–∑–∏—Ä–æ–≤–∞—Ç—å —Å–ø–∏—Å–æ–∫ —Ä–∞–∑–º–µ—Ä–∞ N —Å –ø–æ–º–æ—â—å—é —É–º–Ω–æ–∂–µ–Ω–∏—è
–ú—ã —Å–æ–±–∏—Ä–∞–µ–º—Å—è —Å–æ–∑–¥–∞—Ç—å –ø—Ä–∏–ª–æ–∂–µ–Ω–∏–µ –¥–ª—è —Ç–∞–±–ª–∏—Ü—ã –ª–∏–¥–µ—Ä–æ–≤, –∫–æ—Ç–æ—Ä–æ–µ –æ—Ç—Å–ª–µ–∂–∏–≤–∞–µ—Ç –ø–æ–∑–∏—Ü–∏–∏ –ø–æ–±–µ–¥–∏—Ç–µ–ª–µ–π –º–∞—Ç–µ–º–∞—Ç–∏—á–µ—Å–∫–æ–≥–æ —Ç—É—Ä–Ω–∏—Ä–∞. –í —ç—Ç–æ–π —Ç–∞–±–ª–∏—Ü–µ –ª–∏–¥–µ—Ä–æ–≤ –æ—Ç–æ–±—Ä–∞–∂–∞—é—Ç—Å—è –ø–æ—Å–ª–µ–¥–Ω–∏–µ –≤–æ—Å–µ–º—å —É—á–∞—â–∏—Ö—Å—è —Ç—É—Ä–Ω–∏—Ä–∞.
–£—á–∞—â–∏–µ—Å—è –¥–æ–±–∞–≤–ª—è—é—Ç—Å—è –≤ –ø–æ—Ä—è–¥–∫–µ —É–±—ã–≤–∞–Ω–∏—è. –≠—Ç–æ –ø–æ—Ç–æ–º—É, —á—Ç–æ –ø–µ—Ä–≤—ã–π —É—á–µ–Ω–∏–∫ –≤ —Å–ø–∏—Å–∫–µ —Å—Ç–∞–Ω–æ–≤–∏—Ç—Å—è –ø–æ–±–µ–¥–∏—Ç–µ–ª–µ–º, –∞ –≤–æ—Å—å–º–æ–π —É—á–µ–Ω–∏–∫ –∑–∞–Ω–∏–º–∞–µ—Ç –≤–æ—Å—å–º–æ–µ –º–µ—Å—Ç–æ.
–î–ª—è –Ω–∞—á–∞–ª–∞ —Å–æ–∑–¥–∞—Ç—å –ø—É—Å—Ç–æ–π —Å–ø–∏—Å–æ–∫ –≤ Python :
–≠—Ç–æ—Ç –∫–æ–¥ —Å–æ–∑–¥–∞–µ—Ç –æ–±—ä–µ–∫—Ç —Å–ø–∏—Å–∫–∞ —Å –≤–æ—Å–µ–º—å—é –∑–Ω–∞—á–µ–Ω–∏—è–º–∏. –ö–∞–∂–¥–æ–µ –∏–∑ –∑–Ω–∞—á–µ–Ω–∏–π –≤ —Å–ø–∏—Å–∫–µ –±—É–¥–µ—Ç —Ä–∞–≤–Ω–æ None.
–ù–∞—à –∫–æ–¥ –≤–æ–∑–≤—Ä–∞—â–∞–µ—Ç –Ω–∞—à —Å–ø–∏—Å–æ–∫ –∑–Ω–∞—á–µ–Ω–∏–π None:
81% —É—á–∞—Å—Ç–Ω–∏–∫–æ–≤ –∑–∞—è–≤–∏–ª–∏, —á—Ç–æ –æ–Ω–∏ –±–æ–ª–µ–µ —É–≤–µ—Ä–µ–Ω—ã –≤ —Å–≤–æ–∏—Ö –ø–µ—Ä—Å–ø–µ–∫—Ç–∏–≤—ã —Ç—Ä—É–¥–æ—É—Å—Ç—Ä–æ–π—Å—Ç–≤–∞ –ø–æ—Å–ª–µ –±—É—Ç–∫–µ–º–ø–∞. –ü–æ–ª—É—á–∏—Ç–µ –ø—Ä–∏–≥–ª–∞—à–µ–Ω–∏–µ –Ω–∞ —É—á–µ–±–Ω—ã–π –∫—É—Ä—Å —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–∞ —Å–º–µ–Ω—É –∫–∞—Ä—å–µ—Ä—ã, –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.
–ó–Ω–∞—á–µ–Ω–∏–µ "–ù–µ—Ç" –º–æ–∂–Ω–æ –±—ã–ª–æ –∑–∞–º–µ–Ω–∏—Ç—å —Å –ª—é–±—ã–º –∑–Ω–∞—á–µ–Ω–∏–µ–º –ø–æ —É–º–æ–ª—á–∞–Ω–∏—é, –∫–æ—Ç–æ—Ä–æ–µ –≤—ã —Ö–æ—Ç–∏—Ç–µ. –ù–∞–ø—Ä–∏–º–µ—Ä, –≤—ã –º–æ–∂–µ—Ç–µ —Å–¥–µ–ª–∞—Ç—å –∫–∞–∂–¥–æ–µ –∑–Ω–∞—á–µ–Ω–∏–µ –ø–æ —É–º–æ–ª—á–∞–Ω–∏—é –ø—É—Å—Ç–æ–π —Å—Ç—Ä–æ–∫–æ–π (" "), —á–∏—Å–ª–æ–º –Ω–æ–ª—å (0) –∏–ª–∏ —á–µ–º-—Ç–æ –µ—â–µ.
–ß–µ—Ç–≤–µ—Ä—Ç—å—Ñ–∏–Ω–∞–ª —Ç–æ–ª—å–∫–æ —á—Ç–æ –∑–∞–≤–µ—Ä—à–∏–ª—Å—è, –∏ –¥–≤–∞ —É—á–∞—Å—Ç–Ω–∏–∫–∞ –≤—ã–±—ã–ª–∏. –°–ª–µ–¥—É—é—â–∏–µ —É—á–∞—Å—Ç–Ω–∏–∫–∏ —Ç–µ–ø–µ—Ä—å –º–æ–≥—É—Ç –±—ã—Ç—å –¥–æ–±–∞–≤–ª–µ–Ω—ã –≤ –Ω–∞—à—É —Ç–∞–±–ª–∏—Ü—É –ª–∏–¥–µ—Ä–æ–≤:
- –ß–∞–¥ (—Å–µ–¥—å–º–æ–µ –º–µ—Å—Ç–æ)
- –≠–π–ª–∏–Ω (–≤–æ—Å—å–º–æ–µ –º–µ—Å—Ç–æ)
–ß—Ç–æ–±—ã –¥–æ–±–∞–≤–∏—Ç—å —ç—Ç–∏—Ö —Å—Ç—É–¥–µ–Ω—Ç–æ–≤ –≤ –Ω–∞—à —Å–ø–∏—Å–æ–∫, –º—ã –∏—Å–ø–æ–ª—å–∑—É–µ–º –∑–∞–ø–∏—Å—å –Ω–∞–∑–Ω–∞—á–µ–Ω–∏—è :
–ú—ã —É—Å—Ç–∞–Ω–∞–≤–ª–∏–≤–∞–µ–º –∑–Ω–∞—á–µ–Ω–∏–µ —ç–ª–µ–º–µ–Ω—Ç–∞ –≤ –ø–æ–∑–∏—Ü–∏–∏ 7 - –≠–π–ª–∏–Ω, –∞ –∑–Ω–∞—á–µ–Ω–∏–µ –≤ –ø–æ–∑–∏—Ü–∏–∏ 6 - –ß–∞–¥—É. –≠—Ç–æ –ø–æ—Ç–æ–º—É, —á—Ç–æ —Å–ø–∏—Å–∫–∏ –∏–Ω–¥–µ–∫—Å–∏—Ä—É—é—Ç—Å—è —Å –Ω—É–ª—è. –ü–µ—Ä–≤—ã–π —ç–ª–µ–º–µ–Ω—Ç –≤ –Ω–∞—à–µ–º —Å–ø–∏—Å–∫–µ –∏–º–µ–µ—Ç –∑–Ω–∞—á–µ–Ω–∏–µ 0, –∞ –ø–æ—Å–ª–µ–¥–Ω–∏–π —ç–ª–µ–º–µ–Ω—Ç - 7. –≠—Ç–æ –æ–∑–Ω–∞—á–∞–µ—Ç, —á—Ç–æ –≠–π–ª–∏–Ω —Å—Ç–æ–∏—Ç –ø–æ—Å–ª–µ–¥–Ω–µ–π. –≤ –Ω–∞—à–µ–º —Å–ø–∏—Å–∫–µ, –∞ –ß–∞–¥ - –≤—Ç–æ—Ä–æ–π –ø–æ—Å–ª–µ –ø–æ—Å–ª–µ–¥–Ω–µ–≥–æ.
–ó–∞—Ç–µ–º –¥–∞–≤–∞–π—Ç–µ –Ω–∞–ø–∏—à–µ–º " for " loop –∫–æ—Ç–æ—Ä—ã–π –æ—Ç–æ–±—Ä–∞–∂–∞–µ—Ç –≤—Å–µ –ø–æ–∑–∏—Ü–∏–∏ –≤ –Ω–∞—à–µ–π —Ç–∞–±–ª–∏—Ü–µ –ª–∏–¥–µ—Ä–æ–≤ –∏ –ª—é–¥–µ–π, –∫–æ—Ç–æ—Ä—ã–µ –≤ –Ω–∞—Å—Ç–æ—è—â–µ–µ –≤—Ä–µ–º—è –∑–∞–Ω–∏–º–∞—é—Ç —ç—Ç—É –ø–æ–∑–∏—Ü–∏—é:
–ú—ã –∏—Å–ø–æ–ª—å–∑—É–µ–º range () –¥–ª—è —Å–æ–∑–¥–∞–Ω–∏—è —Å–ø–∏—Å–∫–∞ –∑–Ω–∞—á–µ–Ω–∏–π –æ—Ç 0 –¥–æ –¥–ª–∏–Ω—ã " —Ç–∞–±–ª–∏—Ü—ã –ª–∏–¥–µ—Ä–æ–≤ " —Å–ø–∏—Å–æ–∫. –≠—Ç–æ –ø–æ–∑–≤–æ–ª—è–µ—Ç –Ω–∞–º –ø–µ—Ä–µ–±–∏—Ä–∞—Ç—å –Ω–∞—à —Å–ø–∏—Å–æ–∫ —Å—Ç—É–¥–µ–Ω—Ç–æ–≤ –≤ —Ç–∞–±–ª–∏—Ü–µ –ª–∏–¥–µ—Ä–æ–≤, –æ—Ç—Å–ª–µ–∂–∏–≤–∞—è –ø—Ä–∏ —ç—Ç–æ–º –∫–∞–∂–¥—É—é –ø–æ–∑–∏—Ü–∏—é.
–í –Ω–∞—à–µ–º —Ü–∏–∫–ª–µ –º—ã –ø—Ä–æ–≤–µ—Ä—è–µ–º –µ—Å–ª–∏ –∑–Ω–∞—á–µ–Ω–∏–µ –≤ –æ–ø—Ä–µ–¥–µ–ª–µ–Ω–Ω–æ–π –ø–æ–∑–∏—Ü–∏–∏ –≤ —Å–ø–∏—Å–∫–µ —Ä–∞–≤–Ω–æ "–ù–µ—Ç" . –ï—Å–ª–∏ —ç—Ç–æ –Ω–µ —Ç–∞–∫, –∑–Ω–∞—á–µ–Ω–∏–µ –≤ —ç—Ç–æ–π –ø–æ–∑–∏—Ü–∏–∏ –ø—Ä–∏—Å–≤–∞–∏–≤–∞–µ—Ç—Å—è –ø–µ—Ä–µ–º–µ–Ω–Ω–æ–π " value & rdquo ;. –í –ø—Ä–æ—Ç–∏–≤–Ω–æ–º —Å–ª—É—á–∞–µ –∑–Ω–∞—á–µ–Ω–∏–µ " TBD " –ø—Ä–∏—Å–≤–∞–∏–≤–∞–µ—Ç—Å—è –ø–µ—Ä–µ–º–µ–Ω–Ω–æ–π " value & rdquo ;.
–ó–∞—Ç–µ–º –º—ã —Ä–∞—Å–ø–µ—á–∞—Ç—ã–≤–∞–µ–º –∑–Ω–∞—á–µ–Ω–∏–µ " value " –ü–µ—Ä–µ–º–µ–Ω–Ω–∞—è. –ú—ã —Ç–∞–∫–∂–µ —Ä–∞—Å–ø–µ—á–∞—Ç—ã–≤–∞–µ–º –∑–Ω–∞—á–µ–Ω–∏–µ " l " –ø–ª—é—Å –æ–¥–∏–Ω. –≠—Ç–æ —Å–≤—è–∑–∞–Ω–æ —Å —Ç–µ–º, —á—Ç–æ —Å–ø–∏—Å–∫–∏ –∏–Ω–¥–µ–∫—Å–∏—Ä—É—é—Ç—Å—è —Å –Ω—É–ª—è, –∏ —á—Ç–æ–±—ã –ø–æ–∫–∞–∑–∞—Ç—å —Ä–∞–Ω–≥, –º—ã –¥–æ–ª–∂–Ω—ã –¥–æ–±–∞–≤–∏—Ç—å –∫ —ç—Ç–æ–º—É –∑–Ω–∞—á–µ–Ω–∏—é –µ–¥–∏–Ω–∏—Ü—É. –í –ø—Ä–æ—Ç–∏–≤–Ω–æ–º —Å–ª—É—á–∞–µ –Ω–∞—à–∞ —Ç–∞–±–ª–∏—Ü–∞ –ª–∏–¥–µ—Ä–æ–≤ –±—É–¥–µ—Ç –Ω–∞—á–∏–Ω–∞—Ç—å—Å—è —Å –Ω—É–ª—è.
–î–∞–≤–∞–π—Ç–µ –∑–∞–ø—É—Å—Ç–∏–º –Ω–∞—à –∫–æ–¥ –∏ –ø–æ—Å–º–æ—Ç—Ä–∏–º, —á—Ç–æ –ø—Ä–æ–∏–∑–æ–π–¥–µ—Ç:
–ù–∞—à –∫–æ–¥ —Å–Ω–∞—á–∞–ª–∞ –≤—ã–≤–æ–¥–∏—Ç —Å–ø–∏—Å–æ–∫ –∑–Ω–∞—á–µ–Ω–∏–π None. –ó–∞—Ç–µ–º –Ω–∞—à –∫–æ–¥ –ø—Ä–∏—Å–≤–∞–∏–≤–∞–µ—Ç –∑–Ω–∞—á–µ–Ω–∏—è –¥–≤—É–º –ø–æ—Å–ª–µ–¥–Ω–∏–º —ç–ª–µ–º–µ–Ω—Ç–∞–º –≤ –Ω–∞—à–µ–º —Å–ø–∏—Å–∫–µ. –ù–∞–∫–æ–Ω–µ—Ü, –Ω–∞—à –∫–æ–¥ –≤—ã–≤–æ–¥–∏—Ç –ø–æ–∑–∏—Ü–∏–∏ –≤ —Ç–∞–±–ª–∏—Ü–µ –ª–∏–¥–µ—Ä–æ–≤.
–ü–æ–∑–≤–æ–ª—å—Ç–µ " s –∏–Ω–∏—Ü–∏–∞–ª–∏–∑–∏—Ä–æ–≤–∞—Ç—å –Ω–∞—à —Å–ø–∏—Å–æ–∫ –ª–∏–¥–µ—Ä–æ–≤, –∏—Å–ø–æ–ª—å–∑—É—è range ()
–∏–Ω—Å—Ç—Ä—É–∫—Ü–∏—è:
–ù–∞—à –∫–æ–¥ –≤–æ–∑–≤—Ä–∞—â–∞–µ—Ç –Ω–æ–≤—ã–π —Å–ø–∏—Å–æ–∫ —Å –≤–æ—Å–µ–º—å—é –∑–Ω–∞—á–µ–Ω–∏—è–º–∏:
–í—ã –º–æ–∂–µ—Ç–µ –∏–Ω–∏—Ü–∏–∞–ª–∏–∑–∏—Ä–æ–≤–∞—Ç—å —Å–ø–∏—Å–æ–∫ –Ω–µ—Å—Ç–∞–Ω–¥–∞—Ä—Ç–Ω–æ–≥–æ —Ä–∞–∑–º–µ—Ä–∞, –∏—Å–ø–æ–ª—å–∑—É—è –ª–∏–±–æ —É–º–Ω–æ–∂–µ–Ω–∏–µ, –ª–∏–±–æ –∏–Ω—Å—Ç—Ä—É–∫—Ü–∏—é range ()
.
–ú–µ—Ç–æ–¥ —É–º–Ω–æ–∂–µ–Ω–∏—è –ª—É—á—à–µ –≤—Å–µ–≥–æ –ø–æ–¥—Ö–æ–¥–∏—Ç, –µ—Å–ª–∏ –≤—ã —Ö–æ—Ç–∏—Ç–µ –∏–Ω–∏—Ü–∏–∞–ª–∏–∑–∏—Ä–æ–≤–∞—Ç—å —Å–ø–∏—Å–æ–∫ —Å –æ–¥–∏–Ω–∞–∫–æ–≤—ã–º–∏ –∑–Ω–∞—á–µ–Ω–∏—è–º–∏. –û–ø–µ—Ä–∞—Ç–æ—Ä range ()
- —Ö–æ—Ä–æ—à–∏–π –≤—ã–±–æ—Ä, –µ—Å–ª–∏ –≤—ã —Ö–æ—Ç–∏—Ç–µ, —á—Ç–æ–±—ã —Å–ø–∏—Å–æ–∫ —Å–æ–¥–µ—Ä–∂–∞–ª –∑–Ω–∞—á–µ–Ω–∏—è –≤ –æ–ø—Ä–µ–¥–µ–ª–µ–Ω–Ω–æ–º –¥–∏–∞–ø–∞–∑–æ–Ω–µ.
–¢–µ–ø–µ—Ä—å —É –≤–∞—Å –µ—Å—Ç—å –Ω–∞–≤—ã–∫–∏, –Ω–µ–æ–±—Ö–æ–¥–∏–º—ã–µ –¥–ª—è –∏–Ω–∏—Ü–∏–∞–ª–∏–∑–∞—Ü–∏–∏ Python —Å–ø–∏—Å–æ–∫ —Ä–∞–∑–º–µ—Ä–∞ n –∫–∞–∫ —É —ç–∫—Å–ø–µ—Ä—Ç–∞!