Simple Password Generator using Python

May 26, 2020

Passwords are very essential things right. Choosing a password for accounts are sometimes becomes boring. So, let’s solve this problem in a pythonic way. Let’s create our own password generator using python.

Goal

We need a secure password right. So, our password contains Digit, Lower and Uppercase alphabets, Symbols. So, first, we ask users how much your password long.

Installation

We use these two models, string and random. In case not installed then copy the following command and paste it into your terminal/CMD to install.

pip install strings

pip install random

Coding

import both modules.

import string
import random

Now, get a-z, A-Z, 0-9, and symbols using string functions provided by the string module inbuilt.

s1 = string.ascii_lowercase
s2 = string.ascii_uppercase
s3 = string.digits
s4 = string.punctuation

now, ask the user to get password length

plen = int(input("Enter password length: "))

Now, we make a list of characters we get using the string function.

s = []
s.extend(list(s1))
s.extend(list(s2))
s.extend(list(s3))
s.extend(list(s4))

Here, we convert s1,s2,s3, and s4 in list type because the above string functions like string.ascii_lowercase returns a string. And extend() is used to concrete list. This list looks like this.

['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '!', '"', '#', '$', '%', '&', "'", '(', ')', '*', '+', ',', '-', '.', '/', ':', ';', '<', '=', '>', '?', '@', '[', '\\', ']', '^', '_', '`', '{', '|', '}', '~']

So, we get all characters in one list. We use this list to get our passwords. For that, we use the sample() function to get the random character of a given length.

sample() is an inbuilt function of a random module in Python that returns a particular length list of items chosen from the sequence i.e. list, tuple, string, or set. Used for random sampling without replacement.

At last, join all characters in a list into a string, using a "" character as a separator.

print("".join(random.sample(s, plen)))

Final Code

import string
import random

if __name__ == "__main__":
    s1 = string.ascii_lowercase
    s2 = string.ascii_uppercase
    s3 = string.digits
    s4 = string.punctuation

    plen = int(input("Enter password length: "))
    s = []
    s.extend(list(s1))
    s.extend(list(s2))
    s.extend(list(s3))
    s.extend(list(s4))

    print("Your password: ", end="")
    print("".join(random.sample(s, plen)))

Output

Enter password length: 8
Your password: lrOuGH3^

There are endless possibilities to make this code better. You can add a minimum length password in 8 characters or You can also exclude some characters from the symbol list. Endless possibilities right. So this is a simple password generator using python.

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