password validation - python

In your code, you are assigning the length of your password to the variable length, and then promptly overwriting the value in length with False:

length = len(password)
length = False

Also, you be checking if length, digit, and capital are True, as checking them for False will give you opposite results unless you flip the statement

You should instead move len(password) to the check itself, like so:

password = input("Please enter password: ")

length = False
digit = False
capital = False

if len(password) > 6:
    length = True
    # print("Length Good")

for count in password:
    if count.isdigit():
         digit = True
         # print ("Contains digit")
    elif count.isupper():
         capital = True
         # print ("Contains a capital")

if length == True and digit == True and capital == True:
    print("Password is good")
else:
    print("Bad password")

You are setting the

length = len(password)

and after

length = False

so Python first set length like an int, and in the second instruction Python cancel the value of variable and set the length variable like a boolean(False) and the condition length>6 failed.

Used Bitwise OR operator to validate the password.

Time complexity is O(n).

def validate(password):
    sum = 0
    if len(password) < 7:
        return False
    for p in password:
        if p.isdigit():
            sum |= 1    #2^0
        elif p.isupper():
            sum |= 2    #2^1
        # elif not p.isalnum():
        #     sum |= 4    #2^2

    if sum == 3:    # 2^n - 1 where n is the no. of conditions inside for loop
        return True
    else:
        return False

password = 'voteUp1IfUsefulAnswer'
result = validate(password)
if result:
    print("Password is good")
else:
    print("Bad password")