Random module and pythonrandom Module

Random module and pythonrandom Module

I. random common modules

1. random. random () randomly generates a decimal number

Print (random. random () # output 0.6060562117996784

 

2. random. randint (m, n) randomly generates an integer (including n) from m to n)

Print (random. randint (1, 5) # output 5

　

3. random. randrange (m, n) randomly generates a number from m to n, including m but not n

Print (random. randrange (1, 5) # output 3

 

4. random. smaple (source, n) randomly finds n values in the source to generate a list.

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

　

Ii. string Module

2.1 string. ascii_letters # all uppercase/lowercase English letters

Letters = string. ascii_lettersprint (letters) # output abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ

　　

2.2 string. ascii_lowercase # All lowercase letters

2.3 string. ascii_uppercase # all uppercase letters

 

2.4 string. digit #1-9

 

2.5 string. punctuation # special characters

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

　　

2.6 generate a random Verification Code

We use the random and string modules to generate a verification code containing special characters and uppercase/lowercase letters.

Import randomimport stringstr_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) # output bV5-