Question

We are trying to make sure your passphrase is acceptable! Write a script that asks for an input string that will be used as your password. This input string will have three “words” separated by a space character. Each of these words has specific requirements, listed below. You must write a function for each requirement (three total functions). Make sure your functions follow the original template that provided.

First Function: For the first word, you must check if it is a palindrome (it is the same forward and backward, like "glolg" or "tacocat"), is case-insensitive (so "GfraaRFg" or "VObov" are valid), and only uses alphabetical letters ("tre3ert" and “f^h,@s@,h^f” are not valid).

Second Function: For the second word, you must check if it is a positive integer with at least 4 digits, containing only numeric characters (i.e. no alphabetic, punctuation, or special characters).

Third Function: For the third word, you must check if it starts with one of these special characters (“​@​”, “​$​”, “​%​”, “​^​”, “​&​”), ends with a punctuation mark (only commas ("​,​"), periods ("​.​"), exclamation marks (“​!​”) and question marks ("​?​") are allowed), and has three letters in between the special character and punctuation mark (e.g. “​@dog!​” or “​$tpb?​” or “​^cat,​”).

If the entire password meets all the correct specifications, then print “valid”; otherwise, print “invalid”.

Template Functions ​(DO NOT CHANGE FUNCTION NAMES)​:

def palindrome():

def integer():

def special():

Answer 1

Code:

def palindrome(x):

  x = x.lower()

  x1 = x[::-1]

  if x.isalpha() and x == x1:

    return True

  else:

    return False  

def integer(x):

  if x.isdigit() and len(x)>=4:

    return True

  else:

    return False        

def special(x):

  n = len(x)

  special = '@$%^&'   

  punc = ',.!?'

  if (x[0] in special) and (x[n-1] in punc) and (len(x)==5):

    return True

  else:

    return False  

x,y,z = input().split(" ")

if palindrome(x) and integer(y) and special(z):

  print('valid')

else:

  print('invalid')