input: def StringComparator(string1: str, string2: str) -> None:
      """
      Create a class that receives two strings and has methods for comparing the strings and 
      returning whether they are equal, different, or similar up to a provided threshold.
      >>> StringComparator("hello", "hello").is_equal()
      True
      >>> StringComparator("hello", "world").is_different()
      True
      >>> StringComparator("hello", "hella").is_similar(0.2)
      True
      >>> StringComparator("hello", "hella").is_similar(0.1)
      False
      """
output:     
      class StringComparator:
          def __init__(self, string1: str, string2: str):
              self.string1 = string1
              self.string2 = string2
          
          def is_equal(self) -> bool:
              return self.string1 == self.string2
          
          def is_different(self) -> bool:
              return self.string1 != self.string2
          
          def is_similar(self, threshold: float) -> bool:
              if len(self.string1) != len(self.string2):
                  return False
              differences = sum(1 for a, b in zip(self.string1, self.string2) if a != b)
              similarity_ratio = differences / len(self.string1)
              return similarity_ratio <= threshold
  