Write a Python program to get a new string from a given string where "Is" has been added to the front. If the given string already begins with "Is" then return the string unchange

def new_string(str):
 if len(str) >= 2 and str[:2] == "Is":
   return str
 return "Is" + str
print(new_string("Array"))
print(new_string("IsEmpty"))     

Output:

IsArray                                                                                                       
IsEmpty