Python

Question

HST2: INTRODUCTION TO PROGRAMMING LAB
Write a program that checks if a word supplied as the argument is an Isogram. An Isogram is a word in which no letter occurs more than once.

Create a method called is_isogram that takes one argument, a word to test if it's an isogram. This method should return a tuple of the word and a boolean indicating whether it is an isogram.

If the argument supplied is an empty string, return the argument and False: (argument, False). If the argument supplied is not a string, raise a TypeError with the message 'Argument should be a string'.
My answer :
def is_isogram(word) :
if word is isogram:
return ('word', True)
else:
return ('word', False)
if word == "" :
return( word, false)
elif not word:
Raise TypeError ("Argument should be a string")

With my answer the code is till giving error, I need your help all

Answer 1

def is_isogram(word):
if type(word) != str:
raise TypeError('Argument should be a string')
elif word == "":
return (word, False)
else:
word = word.lower()
for char in word:
if word.count(char) > 1:
return (word, False)
return (word, True)

Answer 2

@StarLord: why do you convert your set to a list ? it's not efficient and it is useless

Answer 3

@StarLord: not really. But as it is at most 126 characters long, that's not a big deal...

Answer 4

I have tested it, all 3 tests passed but i cant submit cuz it doesent seem right somehow..