Question

Task 1:

Some websites impose certain rules for passwords. Write a program that ask the user to enter a password and checks whether a string

(Use input validation to make sure the user enters the correct password and then print it.)

is a valid password. Suppose the password rules are as follows:

• A password must have list a least 10 characters.

• A password must consist of only letters and digits.

• A password must contain at least two digits.

• A password must have at least one uppercase letter.

• A password must have one of the following characters: #, $, &, @, &, %

Example of valid passwords:

Col11egeOfDupag3$

CIS2531Course@cod

Pyth0n&1CODclass

Example of invalid passwords:

myid#COD

CIS2531CollegeOfDupage

Abc123

Task 2:

Reads a string from the user containing a date in the form 03/12/2020 and the program will

display the date in the form March 12, 2020.

Please use comments to explain your work so I can understand it, Thanks

Answer 1

Task 1: Making use of regex will help us to achieve the required result.

reg = "^(?=.*[a-z])(?=.*[A-Z])(?=.*\\d.*\\d)(?=.*[@$%#&])[A-Za-z\d@$#%&]{10,}$"

^ represents start of string

?=.*[a-z] represents the positive lookahead with zero or more occurrence of a - z

?=.*[A-Z] represents the positive lookahead with zero or more occurrence of A - Z i.e at least one uppercase letter

?=.*\\d.*\\d represents the positive lookahead with atleast 2 digits

?=.*[@$%#&] represents the positive lookahead with zero or more occurrence of the special characters @,$,%,#,&

[A-Za-z\d@$#%&]{10,} represents the password should contain at least 10 characters of these

$ represents the end of the string.

def validate_password(password):
    #this regex will validate the password meeting the requirements
    #^ denotes the start, $ denotes the end, ?= positive lookahead, * zero or more occurences,\\d\\d the digits for atleast 2 times and {10,} password atleast 10 characters
    reg = "^(?=.*[a-z])(?=.*[A-Z])(?=.*\\d.*\\d)(?=.*[@$%#&])[A-Za-z\d@$#%&]{10,}$"
    pattern = re.compile(reg)  #compile the regex                 
    match = re.match(pattern, password)   #if there is a match, it returns matched re object
    # validating conditions 
    if match: 
        return True #return True if match
    else:
        return False #else return False
#password=input("Please enter password")
#print(validate_password(password))
print(validate_password("Col11egeOfDupag3$")) #validate the password

Output: True

Task 2: Reads a string from the user containing a date in the form 03/12/2020 and the program will

display the date in the form March 12, 2020.

• split the string into list making use of delimiter '/'.
• convert string to datetime object. since the list is of type str, convert them into int.
• convert the datetime object to this format. %B gives us full month name, %d gives day and %Y gives year.

date_string="12/3/2020" #input string
date_string=date_string.split("/") #split the string into list making use of delimiter '/'
dt = datetime(year=int(date_string[2]), month=int(date_string[1]), day=int(date_string[0])) #convert string to datetime object. since the list is of type str, convert them into int
dt = datetime.strftime(dt,'%B %d, %Y') #convert the datetime object to this format. %B gives us full month name, %d gives day and %Y gives year
print(dt)

Output:

March 12, 2020

I am also attaching the output and code screenshots.

Output and code screenshot:

#Please don't forget to upvote if you find the solution helpful. Feel free to ask doubts if any, in the comments section. Thank you.