[파이썬] 기초 다지기 리스트(list), 임의 문자열 생성

 

부분 항목 접근 : slicing (shell에서 실행하기)

[0,1,2,3,4][0:1]
[0,1,2,3,4][0:2]
[0,1,2,3,4][1:3]
[0,1,2,3,4][:3]
[0,1,2,3,4][3:]
[0,1,2,3,4][:]
[0,1,2,3,4][1:4:2]
[0,1,2,3,4][::2]

 

 

 

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리스트 주요 함수 : len, sort, reverse, random, shuffle  (shell에서 실행하기)

import numpy as np
np.random.seed(42)
iList=[*np.random.randint(0,100,5)]
iList
len(iList)
iList.sort()
iList
import random
random.shuffle(iList)
iList

 

 

 

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임의 숫자 생성 : random.random(), random.randint(a,b)  (shell에서 실행하기)

import random
fList=[]
for _ in range(5):
    fList.append(random.random())
fList
iList=[]
for _ in range(5):
    iList.append(random.randint(0,100))
iList

 

 

 

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임의 문자열 생성 : random.choices()   (shell에서 실행하기)

 

1.

import random
import string
string.ascii_letters
''.join(random.choices(string.ascii_letters,k=10))

 

 

 

2.

import random
import string
sList=[]
for _ in range(5):
    s=''.join(random.choices(string.ascii_letters,k=8))
    sList.append(s)
sList

 

 

 

3.

import random
import string
[''.join(random.choices(string.ascii_letters,k=8)) for _ in range(5)]
sList2=[''.join(random.choices(string.ascii_letters,k=8))for _ in range(5)]
sList2

 

 

 

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임의 문자열 생성 2 : numpy.random.random(), numpy.random.randint()    (shell에서 실행하기)

import numpy as np
np.random.random(5)
list(np.random.random(5))
[*np.random.random(5)]
np.random.randint(0,100,5)
list(np.random.randint(0,100,5))
[*np.random.randint(0,100,5)]