print(random.random())
 
# 输出
0.6060562117996784

print(random.randint(1, 5))
 
#输出
 
5

print(random.randrange(1, 5))
 
# 输出
 
3

print(random.sample(range(100), 5))
 
#输出
[27, 49, 21, 81, 45]

letters = string.ascii_letters
print(letters)
 
# 输出
abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ

sss = string.punctuation
print(sss)
 
# 输出
!"#$%&'()*+,-./:;<=>?@[\]^_`{|}~
　　

import random
import string
 
str_source = {
 1: string.ascii_lowercase,
 2: string.ascii_uppercase,
 3: string.digits,
 4: string.punctuation
}
 
check = []
 
for i in range(1, 5):
  y = random.sample(str_source[i], 1)
  check.append(y[0])
 
print("".join(check))
 
# 输出
bV5-