How To Generate a Random String in Python

In Python, there are 3 ways to generate a random string
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Modified

Using List Comprehension

List comprehensions provide a concise way to create lists. See the following example:

#!/usr/bin/python3
# -*- coding: utf8 -*-

# Import module
import random
import string

# a string of size n
letters = string.ascii_letters
n = 6
lst = ''.join(random.choice(letters) for i in range(n))
print(lst)
nYVWGX
uUeAAJ

Using random.choices Function

Starting with Python 3.6 using random.choices(). For example,

#!/usr/bin/python3
# -*- coding: utf8 -*-

# Import module
import random
import string

# a string of size n
letters = string.ascii_letters
n = 6
lst = ''.join(random.choices(letters, k=n))
print(lst)
Gzmslz
gdESzU

From Python 3.6, random.choices would be faster.

random.choice is not secure either. Use random.SystemRandom().choice() or use os.urandom() directly. 

#!/usr/bin/python3
# -*- coding: utf8 -*-

# Import module
import random
import string

# a string of size n
letters = string.ascii_letters
n = 6
lst = ''.join(random.SystemRandom().choices(letters, k=n))
print(lst)
wxTUTI
QwBInx

Using uuid Module

This module provides immutable UUID objects. uuid4() creates a random UUID.

If UUIDs are okay for your purposes, use the built-in uuid package. See the following example:

#!/usr/bin/python3
# -*- coding: utf8 -*-

# Import module
import uuid

# a string of size n
n = 6
lst = uuid.uuid4().hex[0:n]
print(lst)
465fc7
fbcccb

Related Tags

#generate# #string# #random#

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