๋ฐ˜์‘ํ˜•

collections 1
[๋”ฅ๋Ÿฌ๋‹] collections ๋ผ์ด๋ธŒ๋Ÿฌ๋ฆฌ์˜ Counter ํด๋ž˜์Šค

collections ๋ผ์ด๋ธŒ๋Ÿฌ๋ฆฌ์˜ Counter ํด๋ž˜์Šค ์นด์šดํ„ฐ ์ฒ˜๋ฆฌ ( ์ˆซ์ž ์„ธ๋Š” ์ฒ˜๋ฆฌ) ํ•จ์ˆ˜ ์ œ๊ณต from collections import Counter list = ['a','b','c','a','a','c'] ๋ฐฐ์—ด list์˜ ์š”์†Œ ์ถœํ˜„ ์ˆ˜๋ฅผ ์„ธ์„œ ์ถœ๋ ฅ ์ด ๋•Œ ๊ฒฐ๊ณผ๋Š” ๋”•์…”๋„ˆ๋ฆฌ ์ž๋ฃŒํ˜• (key:value) counter = counter(list) print(counter) Counter({'a' : 3, 'c' : 2, 'b' : 1}) ์ถœํ˜„ ์ˆœ์„œ๊ฐ€ ๋†’์€ ์ˆœ๋Œ€๋กœ ํ”„๋ฆฐํŠธ most_common์˜ (๋งค๊ฐœ๋ณ€์ˆ˜ n)์„ ์ž…๋ ฅํ•˜๋ฉด ์ƒ์œ„ n ๊ฐœ์˜ ํ‚ค์™€ ๊ฐ’ ๋ฆฌํ„ด ์•„๋ฌด๊ฒƒ๋„ ์ž…๋ ฅํ•˜์ง€ ์•Š์œผ๋ฉด ์ „์ฒด ๋ฆฌํ„ด for elem, cnt in counter.most_common(): print(elem,cnt) a 3 c 2 b 1
๋”ฅ๋Ÿฌ๋‹/Today I learned : 2021.04.02
1
๋”๋ณด๊ธฐ
๋ฐ˜์‘ํ˜•

ํ‹ฐ์Šคํ† ๋ฆฌํˆด๋ฐ”