Python Password Checker
- Samuel Cork
- Sep 22
- 2 min read
This is a python code for a password grader. Typing in a password will put the password through multiple checks to see if it is strong. Very small and simple code.
Full code for Password Checker
# Samuel Cork
# A self developed code to check inputs and decide whether they are strong or weak passwords.
# A function to check the length of the password.
def check_length(user_input):
return len(user_input) >= 8 #checks if the password is greater than or equal to 8
# Check for uppercase and lowercase
def check_case(user_input):
upper = any(char.isupper() for char in user_input)
lower = any(char.islower() for char in user_input)
return upper and lower
# Checks for numbers
def check_digit(user_input):
return any(char.isdigit() for char in user_input)
# Checks for special Characters
def check_symbol(user_input):
symbol = '!@#$%^&*()_+-=[]{}|,./<>?\\'
return any(char in symbol for char in user_input)
#for looping future code
loop = True
# User prompt
print('Hello! Please input a password then press "Enter" to be graded.')
while loop:
# user input
password = input()
if password == 'exit':
loop = False
break
# Information on the users input
print('Password length:', len(password))
#Prompts for user readability
print('Now grading your input.')
#Gives output on the password and recommendations
if check_length(password):
print('Passed: Password contains at least 8 characters.')
else: print('Failed: Make sure password is at least 8 characters.')
###
if check_case(password):
print('Passed: Password contains upper and lowercase letters.')
else: print('Failed: Password must contain both upper and lowercase letters.')
###
if check_digit(password):
print('Passed: Password contains at least one digit.')
else: print('Failed: Make sure password has at least one digit.')
###
if check_symbol(password):
print('Passed: (Optional) Password contains at least one symbol.')
else: print('Optional: No symbol was entered, '
'However NIST no longer recommends special characters.')
print('')
print('Try another password. or type "exit" to end the program.')
print('')
###
Python file on github
Simple prompt that tells you to enter a password
Password shown at the top, gives simple info like the length as well as if it passed or failed recommended password requirements.
Symbol requirement labeled as optional because of the NIST change not requiring a use of symbol as it may cause users to forget and use poor password practices.
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