CODEWITHSUNDEEP
pythonrandom
Prometheus
Prometheus

Reputation: 33655

Python create a random pin four digits long using random

In Python how can I create a random pin four digits long?

I know Python has the random.randint function but I can't see a way to make the number four digits.

Upvotes: 5

Views: 6420

Answers (6)

WBAR
WBAR

Reputation: 4984

Try this:

import random

pin = str(random.randint(0, 9999)).rjust(4, '0')

Upvotes: 0

greschd
greschd

Reputation: 636

These days, you'd want to use the secrets module if the purpose is to generate a secure PIN:

import secrets

pin = '{:0>4}'.format(secrets.randbelow(10**4))

The formatting pads with zeros from the left, for the case where the number is below 1000.

Upvotes: 4

rahul shukla
rahul shukla

Reputation: 9

#python module
import random

# function to generate PIN
def generatePIN():

    #varible PIN store all random digits
    PIN = ""
    #you change the length of pin by changing value of range
    for i in range(4):
        #randint generates a random number between 0,9
        PIN = PIN + str(random.randint(0,9))
    return(f"4 digits PIN:{PIN}")

print(generatePIN())

Upvotes: 0

dansalmo
dansalmo

Reputation: 11694

An integer output would need to deal with missing leading zeros so it is best to output a string or list of ints:

If you want any possible combination do:

from random import randint
[randint(0,9) for _ in range(4)]

or

''.join(str(randint(0,9)) for _ in range(4))

If you do not want any duplicate digits. 

from random import sample  
sample(range(10), 4)

or

''.join(sample("0123456789", 4))

Upvotes: 6

Totem
Totem

Reputation: 7369

You could try:

import random

pin = random.sample(xrange(10), 4)

print pin

example output:

[6,7,4,2]

random module info

Upvotes: 2

Christian Tapia
Christian Tapia

Reputation: 34166

Try this:

import random

pin = random.randint(999, 9999)
print pin

randint(a, b) will give a random number from a to b. See Python docs for more information about random module.

Upvotes: 5

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