๐Ÿ˜บ python ๋ฌธ๋ฒ• ์ถ”๊ฐ€

may_soouuยท2020๋…„ 8์›” 22์ผ
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์ฑ…์„ ์ฝ์œผ๋ฉด์„œ ๋ชฐ๋ž๋˜ ์ƒˆ๋กœ์šด ๋ฌธ๋ฒ•๋“ค์ด ์ƒ๊ฒจ์„œ ์ถ”๊ฐ€๋กœ ๋ฒจ๋กœ๊ทธ ์ •๋ฆฌ๋ฅผ ํ•˜๋ ค๊ณ  ํ•œ๋‹ค.

exec

  • ๋ฌธ์ž์—ด๋กœ ๋งŒ๋“  ํ•จ์ˆ˜๋ฅผ ์‹คํ–‰ํ•˜๋Š” ๋‚ด์žฅ ํ•จ์ˆ˜
s ="""
def add_(x,y):
    return x+y
"""

exec(s)
print(add_(10,20))
 #result : 30

setitem

  • ๋ฌธ์ž์—ด ๋ฐ”๊ฟ”์ฃผ๋Š” ํ•จ์ˆ˜
num = [1,2,3,4,5]
num.__setitem__(2,99)
print(num) 
  # result [1,2,99,4,5]

shuffle / choices

  • shuffle : ๋ฆฌ์ŠคํŠธ์˜ ๋ชจ๋“  ์›์†Œ๋ฅผ ์ž„์˜๋กœ ์„ž์„ ๋•Œ
  • choices : ํŠน์ • ๊ฐœ์ˆ˜์˜ ์›์†Œ๋ฅผ ์„ ํƒํ•  ๋•Œ
    • choices ๋Š” ํ•จ์ˆ˜์— k ์ธ์ž ๊ฐ’์„ ๋ฐฐ์ •ํ•œ๋‹ค!
import random
a = [1,2,3,4,55,6,3,22,3,4,76,8,9,39,45]
random.shuffle(a)       #๋ฆฌ์ŠคํŠธ ์„ž๊ธฐ
random.choices(a,k=6)   #6๊ฐœ๋ฅผ ๋ฝ‘์•„์ฃผ๋Š” ๊ฒƒ

> ๊ทผ๋ฐ ์ด๋ ‡๊ฒŒ ํ•˜๊ฒŒ ๋˜๋ฉด ์‹คํ–‰ ํ•  ๋•Œ๋งˆ๋‹ค ๊ฐ™์€ 6๊ฐœ์˜ ๋ฆฌ์ŠคํŠธ๋งŒ ๋‚˜์˜จ๋‹ค
numpy ๋ชจ๋“ˆ์„ ์‚ฌ์šฉํ•˜๋ฉด ํ•ด๊ฒฐ์ด ๊ฐ€๋Šฅํ•˜๋‹ค!
 (ํŒŒ์ด์ฐธ์—์„œ ๋ˆ”ํ”ผ ๋ชจ๋“ˆ์„ ์„ค์น˜ํ–ˆ๋Š”๋ฐ ์‹คํ–‰์ด ์•ˆ๋œ๋‹ค ,, ๐Ÿ˜‚๐Ÿ˜‚)
 
import numpy as np
a = [1,2,3,4,55,6,3,22,3,4,76,8,9,39,45]
random.shuffle(a,random = np.random.random)
random.choices(a,k=6)
 #๋ˆ”ํ”ผ๋ฅผ ์ž„ํฌํŠธํ•˜๊ณ  ์‹คํ–‰ํ•˜๋ฉด ๋Œ๋ฆด ๋•Œ๋งˆ๋‹ค ๋‹ค๋ฅธ ๊ฐ’์ด ๋‚˜์˜จ๋‹ค.

๊ฐ€๋ณ€์ธ์ž๋กœ ๋ฐ›๊ธฐ

x, *y  = (1,2,3)
print(x,y)
  #result : (1, [2,3])
  
 * ๋„ฃ์œผ๋ฉด ๊ฐ€๋ณ€ ์ธ์ž๋กœ ๋ฐ›์„ ์ˆ˜ ์žˆ์Œ

์‚ฌ์šฉํ•˜์ง€ ์•Š๋Š” ๋ณ€์ˆ˜ ์ฒ˜๋ฆฌํ•˜๊ธฐ

_,a = 100,200
print(a)  #100
print(_)  #200

for _ in range(2):
    print("Hello")
  #result : "Hello" "Hello"

๋‘๊ฐœ์˜ ๋ฆฌ์ŠคํŠธ๋ฅผ ํ•œ ์ค„๋กœ ํ‘œํ˜„ํ•˜๊ณ  ์‹ถ์„ ๋•Œ

import itertools as it
ls = [1,2,3,4]
bs = [4,5,6,7]
for i in it.chain(ls,bs):
    print(i)
    
 itertool ๋ชจ๋“ˆ ํ™œ์„ฑํ™” 1,2,3,4,4,5,6,7 ์ด ํ•œ์ค„๋กœ 
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