code: def initialize_hashes(self):
          
          if ('md5' in self.hashes):
              self.md5_calc = hashlib.md5()
          if ('sha-1' in self.hashes):
              self.sha1_calc = hashlib.sha1()
          if ('sha-256' in self.hashes):
              self.sha256_calc = hashlib.sha256()
docs: Create new hashlib objects for each hash we are going to calculate.