[Python_Bootcamp] 리스트 랜덤 추출

이 글은 Dr. Angela Yu의 [Python_Bootcamp]를 수강하며 정리한 글입니다.

 

👉 기본 환경

- Language: Python

- IDE: Replit

 

 

#Password Generator Project
import random
 
letters = [
    'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
    'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', 'A', 'B', 'C', 'D',
    'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S',
    'T', 'U', 'V', 'W', 'X', 'Y', 'Z'
]
numbers = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9']
symbols = ['!', '#', '$', '%', '&', '(', ')', '*', '+']
 
print("Welcome to the PyPassword Generator!")
nr_letters = int(input("How many letters would you like in your password?\n"))
nr_symbols = int(input(f"How many symbols would you like?\n"))
nr_numbers = int(input(f"How many numbers would you like?\n"))
 
letter_list = [];
for i in range(0, nr_letters):
  random_num = random.randint(0, len(letters)-1);
  letter_list.append(letters[random_num]);
 
symbol_list = [];
for i in range(0, nr_symbols):
  random_num = random.randint(0, len(symbols)-1);
  symbol_list.append(symbols[random_num]);
 
number_list = [];
for i in range(0, nr_numbers):
  random_num = random.randint(0, len(numbers)-1);
  number_list.append(numbers[random_num]);
 
all = letter_list+symbol_list+number_list;
 
random_list = []
 
while len(random_list) < len(all):
    all_len = len(all)
    random_num = random.randint(0, all_len - 1)
    if (random_list.count(random_num) == 0):
        random_list.append(random_num)
 
for i in random_list:
    print(all[i], end="")
 

1. while len(random_list) < len(all):

    - random_list가 all과 길이가 같아질 때까지 반복

 

2. if (random_list.count(random_num) == 0):

    - count()를 활용하여, 랜덤값 중 중복되지 않은 요소만 random_list에 추가

 

3. for i in random_list:

    - 중복이 제거된 random_list 값을 all에 대입해서 random하게 all list 출력

 

4. print(all[i], end="")

    - end=""를 통해 print 개행 제거

 

 

#Password Generator Project
import random
 
letters = [
    'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
    'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', 'A', 'B', 'C', 'D',
    'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S',
    'T', 'U', 'V', 'W', 'X', 'Y', 'Z'
]
numbers = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9']
symbols = ['!', '#', '$', '%', '&', '(', ')', '*', '+']
 
print("Welcome to the PyPassword Generator!")
nr_letters = int(input("How many letters would you like in your password?\n"))
nr_symbols = int(input(f"How many symbols would you like?\n"))
nr_numbers = int(input(f"How many numbers would you like?\n"))
 
pwd_list = [];
 
for char in range(1, nr_letters + 1):
    random_char = random.choice(letters)
    pwd_list += random_char
 
for char in range(1, nr_symbols + 1):
    pwd_list += random.choice(symbols)
 
for char in range(1, nr_numbers + 1):
    pwd_list += random.choice(numbers)
 
random.shuffle(pwd_list);
 
pwd2 = "";
for char in pwd_list:
  pwd2 += char;
  
print(pwd2);
 

1. random_char = random.choice(letters)

    - choice(): 리스트에서 랜덤하게 요소를 반환

 

2. list에 요소를 추가하는 방법

    - pwd_list += random_char;

    - pwd_list.append(random_char);

 

3. random.shuffle(pwd_list)

    - shuffle(): 리스트 요소 셔플

 

4. pwd2 += char;

    - StringBuffer와 비슷하게 pwd_list 요소를 pwd2에 추가