Python Random String: How to make a random string in Python

Following is an example to get a random string in Python.

import random
import string


def random_string(length: int):
    s = ''
    for i in range(length):
        s += random.choice(string.digits + string.ascii_letters)
    return s


print(random_string(4))  # 82FE
print(random_string(5))  # DwQWk

The argument is length of string.

string.digits

string module has a constant string digits. digits looks like a list from 0 to 9 but is a string by concatenating 10 digits.

a = string.digits
print(a)  # 0123456789
print(type(a))  # <class 'str'>

digits is a string, not list.

string.ascii_letters

ascii_letters is also a constant string.

a = string.ascii_letters

print(a)
# abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ

print(type(a))
# <class 'str'>

string.ascii_lowercase

a = string.ascii_lowercase

print(a)
# abcdefghijklmnopqrstuvwxyz

print(type(a))
# <class 'str'>

string.ascii_uppercase

a = string.ascii_uppercase

print(a)
# ABCDEFGHIJKLMNOPQRSTUVWXYZ

print(type(a))
# <class 'str'>

string.punctuation

a = string.punctuation

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

print(type(a))
# <class 'str'>

Another example

The function that returns a random string containing digits, alphabets and symbols is like this.

import random
import string


def random_string(length: int):
    s = ''
    for i in range(length):
        s += random.choice(string.digits + string.ascii_letters + string.punctuation)
    return s


print(random_string(12))  # -1/3aYKNL?FX
print(random_string(15))  # RG$}`e`Ti6Je%4Y

This can be used to create a token or initial password.