Python's built-in module random stochastic module approach and use case (implementation of five-digit random verification code)

1. Random (self):

Get the next random number in the range [0.0, 1.0)

Take 0 to 1 random floating-point numbers directly

 
 
import random
print (random.random ())

C: \ python35 \ python3.exe D: / pyproject / day21 module / random random module.py

0.3105503800442595

2, Randint (self, A, b)

Return random integer in range [A, b], including both end points.

Returns a random integer between a A and a, including A and b

import random
print (random.randint (5,99))

C: \ python35 \ python3.exe D: / pyproject / day21 module / random random module.py

53 

3, Randrange (self, start, stop=None, Step=1, _int=int):

Choose a random item from range (Start, stop[, step]).
This fixes the problem with Randint () which includes the
Endpoint In Python this is usually don't what want

Returns a direct random integer, not including B, that is >=a smaller than the range of B

import random
print (random.randrange (1,9))

C: \ python35 \ python3.exe D: / pyproject / day21 module / random random module.py

3 

You can also specify the step size

import random
print (random.randrange (1,9, step = 2))

C: \ python35 \ python3.exe D: / pyproject / day21 module / random random module.py

5 

4, Choice (self, seq)

Choose a random element from a non-empty sequence [? EL?M?NT] Element sequence sequence

Take a random element inside a sequence that is not empty

import random
print (random.choice ([11,22,33]))

C: \ python35 \ python3.exe D: / pyproject / day21 module / random random module.py

twenty two 

5. Sample (self, population, K)

Chooses k unique random elements from a population sequence or set

Select K random elements from the sequence inside or within the collection, to return a list

Here's an example of randomly fetching 2 elements from a collection.

import random
print (random.sample ({11,22, "gouguoqi", 66}, 2))

C: \ python35 \ python3.exe D: / pyproject / day21 module / random random module.py

[‘Gouguoqi’, 11] 

6. Uniform (self, A, b):

Get a random number in the range [A, b] or [A, b] depending on rounding

Select a floating-point number of random numbers between A and b

import random
print (random.uniform (2,900))

C: \ python35 \ python3.exe D: / pyproject / day21 module / random random module.py

621.520221600369 

7, Shuffle (self, x, random=None)

is to shuffle the elements in the list (in a scrambled order, with no eggs)

import random
ret = [11,22,33,44,55]
random.shuffle (ret)
print (ret)

C: \ python35 \ python3.exe D: / pyproject / day21 module / random random module.py

[33, 22, 55, 44, 11] 

8, the production of five-digit random verification code

import random
def v_code ():
     ret = ""
     for n in range (5): # loop several times
         num = random.randint (0,9) #take a random number between 0-9
         alf = chr (random.randint (65,122)) #chr between 65 and 122 is the range of lowercase a to z and uppercase A to Z
         s = str (random.choice ([num, alf])) # choose a random element from the list and convert it to str
         ret + = s # Add s to ret each time, s is a string, so the last ret is a 5 digit and letter combination verification code
     return ret
print (v_code ())

C: \ python35 \ python3.exe D: / pyproject / day21 module / random random module.py

6s070 

Python's built-in module random stochastic module approach and use case (implementation of five-digit random verification code)