Python KeyError: руководство для начинающих

–û—à–∏–±–∫–∞ Python KeyError –≤–æ–∑–Ω–∏–∫–∞–µ—Ç –ø—Ä–∏ –ø–æ–ø—ã—Ç–∫–µ –¥–æ—Å—Ç—É–ø–∞ –∫ –Ω–µ—Å—É—â–µ—Å—Ç–≤—É—é—â–µ–º—É —ç–ª–µ–º–µ–Ω—Ç—É –≤ —Å–ª–æ–≤–∞—Ä–µ. –í—ã –º–æ–∂–µ—Ç–µ –∏—Å–ø—Ä–∞–≤–∏—Ç—å —ç—Ç—É –æ—à–∏–±–∫—É, –∏–∑–º–µ–Ω–∏–≤ —Å–≤–æ—é –ø—Ä–æ–≥—Ä–∞–º–º—É, —á—Ç–æ–±—ã –≤—ã–±—Ä–∞—Ç—å —ç–ª–µ–º–µ–Ω—Ç –∏–∑ —Å—É—â–µ—Å—Ç–≤—É—é—â–µ–≥–æ —Å–ª–æ–≤–∞—Ä—è. –ò–ª–∏ –≤—ã –º–æ–∂–µ—Ç–µ —Å–ø—Ä–∞–≤–∏—Ç—å—Å—è —Å —ç—Ç–æ–π –æ—à–∏–±–∫–æ–π, —Å–Ω–∞—á–∞–ª–∞ –ø—Ä–æ–≤–µ—Ä–∏–≤, —Å—É—â–µ—Å—Ç–≤—É–µ—Ç –ª–∏ –∫–ª—é—á.

–í—ã —Ç–æ–ª—å–∫–æ —á—Ç–æ –ø–æ–ª—É—á–∏–ª–∏ —Å–æ–æ–±—â–µ–Ω–∏–µ –æ–± –æ—à–∏–±–∫–µ KeyError? –ù–µ –≤–æ–ª–Ω—É–π—Ç–µ—Å—å! –ö–æ–≥–¥–∞ –≤–æ–∑–Ω–∏–∫–∞–µ—Ç KeyError, —ç—Ç–æ –æ–∑–Ω–∞—á–∞–µ—Ç, —á—Ç–æ –≤—ã –ø—ã—Ç–∞–µ—Ç–µ—Å—å –ø–æ–ª—É—á–∏—Ç—å –¥–æ—Å—Ç—É–ø –∫ –∫–ª—é—á—É –≤–Ω—É—Ç—Ä–∏ –Ω–µ—Å—É—â–µ—Å—Ç–≤—É—é—â–µ–≥–æ —Å–ª–æ–≤–∞—Ä—è. –û–±—Ä–∞–±–æ—Ç–∞—Ç—å –∏ –∏—Å–ø—Ä–∞–≤–∏—Ç—å —ç—Ç—É –æ—à–∏–±–∫—É –ª–µ–≥–∫–æ, –µ—Å–ª–∏ –≤—ã –∑–Ω–∞–µ—Ç–µ, –∫–∞–∫ —ç—Ç–æ —Å–¥–µ–ª–∞—Ç—å.

KeyErrors –º–æ–∂–Ω–æ –æ–±—Ä–∞–±–æ—Ç–∞—Ç—å —Å –ø–æ–º–æ—â—å—é –±–ª–æ–∫–∞ try & hellip; except, –∏—Å–ø–æ–ª—å–∑—É—è " in " –∫–ª—é—á–µ–≤–æ–µ —Å–ª–æ–≤–æ –∏–ª–∏ –∑–∞—Ä–∞–Ω–µ–µ –ø—Ä–æ–≤–µ—Ä–∏–≤ –∫–ª—é—á —Å –ø–æ–º–æ—â—å—é –∏–Ω–¥–µ–∫—Å–∞—Ü–∏–∏.

–í —ç—Ç–æ–º —Ä—É–∫–æ–≤–æ–¥—Å—Ç–≤–µ –º—ã –ø–æ–≥–æ–≤–æ—Ä–∏–º –æ —Ç–æ–º, —á—Ç–æ —Ç–∞–∫–æ–µ Python KeyErrors –∏ –ø–æ—á–µ–º—É –æ–Ω–∏ –≤–æ–∑–Ω–∏–∫–∞—é—Ç. –ú—ã —Ä–∞—Å—Å–º–æ—Ç—Ä–∏–º –ø—Ä–∏–º–µ—Ä –æ—à–∏–±–∫–∏ –∏ —Å–ø–æ—Å–æ–±—ã –µ–µ –∏—Å–ø—Ä–∞–≤–ª–µ–Ω–∏—è, —á—Ç–æ–±—ã –≤—ã –∑–Ω–∞–ª–∏, –∫–∞–∫ —É—Å—Ç—Ä–∞–Ω—è—Ç—å –æ—à–∏–±–∫–∏ KeyErrors –≤ –±—É–¥—É—â–µ–º.

–î–∞–≤–∞–π—Ç–µ –ø—Ä–∏—Å—Ç—É–ø–∏–º!

–ß—Ç–æ —Ç–∞–∫–æ–µ –û—à–∏–±–∫–∞ Python KeyError?

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

–°–ª–æ–≤–∞—Ä—å Python - —ç—Ç–æ –Ω–∞–±–æ—Ä –ø–∞—Ä –∫–ª—é—á-–∑–Ω–∞—á–µ–Ω–∏–µ, –∫–æ—Ç–æ—Ä—ã–µ —Ö—Ä–∞–Ω—è—Ç—Å—è –≤ —Ñ–∏–≥—É—Ä–Ω—ã—Ö —Å–∫–æ–±–∫–∞—Ö ({}):

–ö–ª—é—á–∏: " name ", " price " –∏ " RAM " . –ö–ª—é—á–∏ –≤ —Å–ª–æ–≤–∞—Ä–µ –ø–æ—è–≤–ª—è—é—Ç—Å—è –ø–µ—Ä–µ–¥ –¥–≤–æ–µ—Ç–æ—á–∏–µ–º.

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

–î–∞–≤–∞–π—Ç–µ –ø–æ—Å–º–æ—Ç—Ä–∏–º, —á—Ç–æ –ø—Ä–æ–∏–∑–æ–π–¥–µ—Ç. –µ—Å–ª–∏ –º—ã –ø–æ–ø—ã—Ç–∞–µ–º—Å—è –ø–æ–ª—É—á–∏—Ç—å –∫–æ–ª–∏—á–µ—Å—Ç–≤–æ USB-–ø–æ—Ä—Ç–æ–≤ –≤ –Ω–∞—à–µ–º —Å–ª–æ–≤–∞—Ä–µ:

–ù–∞—à –∫–æ–¥ –≤–æ–∑–≤—Ä–∞—â–∞–µ—Ç:

–≠—Ç–∞ –æ—à–∏–±–∫–∞ —Å–æ–æ–±—â–∞–µ—Ç –Ω–∞–º, —á—Ç–æ —É–∫–∞–∑–∞–Ω–Ω—ã–π –Ω–∞–º–∏ –∫–ª—é—á –Ω–µ —Å—É—â–µ—Å—Ç–≤—É–µ—Ç. –í —ç—Ç–æ–º —Å–ª—É—á–∞–µ –æ—Ç—Å—É—Ç—Å—Ç–≤—É–µ—Ç –∫–ª—é—á " usb_ports "

KeyError Python: —Ä–µ—à–µ–Ω–∏—è

–ß—Ç–æ–±—ã –æ–±—Ä–∞–±–æ—Ç–∞—Ç—å KeyError —Å–ª–æ–≤–∞—Ä—è Python, –≤—ã –º–æ–∂–µ—Ç–µ:

• –ó–∞—Ä–∞–Ω–µ–µ –ø—Ä–æ–≤–µ—Ä—å—Ç–µ –∫–ª—é—á —Å –ø–æ–º–æ—â—å—é –∏–Ω–¥–µ–∫—Å–∞—Ü–∏–∏.
• –ò—Å–ø–æ–ª—å–∑—É–π—Ç–µ " in " –∫–ª—é—á–µ–≤–æ–µ —Å–ª–æ–≤–æ –¥–ª—è –ø—Ä–æ–≤–µ—Ä–∫–∏ –Ω–∞–ª–∏—á–∏—è –∫–ª—é—á–∞.
• –ò—Å–ø–æ–ª—å–∑—É–π—Ç–µ –±–ª–æ–∫ try & hellip;