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๋ฐ˜์‘ํ˜•
hELLO ยท Designed By ์ •์ƒ์šฐ.
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Programming language/Python

[python] accumulate(itertools), ๋ˆ„์  ํ•ฉ

[python] accumulate(itertools), ๋ˆ„์  ํ•ฉ
Programming language/Python

[python] accumulate(itertools), ๋ˆ„์  ํ•ฉ

2020. 8. 30. 20:19
๋ฐ˜์‘ํ˜•

๐Ÿ“— accumulate

๋œป์œผ๋กœ๋Š” ์ถ•์ ํ•˜๋‹ค?

ํ•œ๋งˆ๋””๋กœ ๋ˆ„์ ๋œ ํ•ฉ์„ ๋ฝ‘์•„์ฃผ๋Š” ๋…€์„

๐Ÿ”ต ์‚ฌ์šฉ๋ฒ•

from itertools import accumulate

a = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
b = list(accumulate(a))
print(a)  # [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
print(b)  # [1, 3, 6, 10, 15, 21, 28, 36, 45, 55]

๊ฐ’์ด ์ €์ ˆ๋กœ ๋ˆ„์ ๋˜๋Š” ๊ฒƒ์„ ๋ณผ ์ˆ˜ ์žˆ๋‹ค.

์ด๊ฒƒ์„ ์™œ ์‚ฌ์šฉํ•˜๋А๋ƒํ•˜๋ฉด

์‚ฌ์‹ค for๋ฌธ ๋งŒ์œผ๋กœ๋„ ๊ฐ’์„ ๋ˆ„์ ํ•œ ๋ฆฌ์ŠคํŠธ๋ฅผ ๋ฝ‘์„ ์ˆ˜ ์žˆ์ง€๋งŒ ์†๋„๋ฉด์—์„œ ํฐ ์ฐจ์ด๊ฐ€ ๋‚œ๋‹ค.( ํŠนํžˆ ๊ฐ’์ด ์ปค์ง€๋ฉด ์ปค์งˆ์ˆ˜๋ก )

 

๐Ÿ”ต ์†๋„ ์ธก์ •

1๋ฒˆ for๋ฌธ

a = [x+1 for x in range(1000000)]
for i in range(1, len(a)):
    a[i] += a[i-1]

2๋ฒˆ accumulate

a = [x+1 for x in range(1000000)]
b = list(accumulate(a))
์‹คํ–‰ ์ฝ”๋“œ ๊ฐ’ ์†๋„
for๋ฌธ 10๋งŒ 0.01894974708557129
accumulate 10๋งŒ 0.004986286163330078
for๋ฌธ 1000๋งŒ 1.868004560470581
accumulate 1000๋งŒ 0.766948938369751

accumulate๊ฐ€ ํ™•์‹คํžˆ ๋น ๋ฅธ๊ฒƒ์„ ๋ณผ ์ˆ˜ ์žˆ๋‹ค. ๋งŽ์ด ์‚ฌ์šฉํ•  ์ผ์€ ์—†๊ฒ ์ง€๋งŒ ์•Œ์•„๋‘๋ฉด ์ข‹์„ ๊ฒƒ ๊ฐ™๋‹ค.

๋ฐ˜์‘ํ˜•
์ €์ž‘์žํ‘œ์‹œ ๋น„์˜๋ฆฌ ๋ณ€๊ฒฝ๊ธˆ์ง€ (์ƒˆ์ฐฝ์—ด๋ฆผ)

'Programming language > Python' ์นดํ…Œ๊ณ ๋ฆฌ์˜ ๋‹ค๋ฅธ ๊ธ€

[python] F-String  (0) 2020.09.06
[python] filter  (2) 2020.08.31
[python] defaultdict  (0) 2020.08.29
[python] pow, ์ œ๊ณฑ, ๊ฑฐ๋“ญ์ œ๊ณฑ๊ณผ ๋‚˜๋จธ์ง€  (0) 2020.08.28
[python] input, sys.stdin.readline  (0) 2020.08.27
  • ๐Ÿ“— accumulate
  • ๐Ÿ”ต ์‚ฌ์šฉ๋ฒ•
  • ๐Ÿ”ต ์†๋„ ์ธก์ •
'Programming language/Python' ์นดํ…Œ๊ณ ๋ฆฌ์˜ ๋‹ค๋ฅธ ๊ธ€
  • [python] F-String
  • [python] filter
  • [python] defaultdict
  • [python] pow, ์ œ๊ณฑ, ๊ฑฐ๋“ญ์ œ๊ณฑ๊ณผ ๋‚˜๋จธ์ง€
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