Question: 
Write a python function to check whether all the characters in a given string are unique.


Model's Code:
def unique_Characters(s):
    return len(s) == len(set(s))



Sample Correct Code:
def unique_Characters(str):
    for i in range(len(str)):
        for j in range(i + 1,len(str)): 
            if (str[i] == str[j]):
                return False;
    return True;


Asserts:
assert unique_Characters('aba') == False
assert unique_Characters('abc') == True
assert unique_Characters('abab') == False


Tests:
Test 1 of 3: PASS
Test 2 of 3: PASS
Test 3 of 3: PASS

Test 352 of 974: 255/352 (72.44318181818183%): success