ighalogenesisosasenaga / cryptography Goto Github PK

def _decrypt(self):
        output = ""
        # Variable to store suspected sequences
        current_sequence = ""
        # Replacement dictionary for special characters
        replacement_dict = self._nulls
        # Boolean to know if the current_sequence variable is not empty
        in_sequence = False
        for char in self._lampboard:
            if not in_sequence and char in self._sequence_marker:
                # Start a sequence
                current_sequence += char
                in_sequence = True
            elif in_sequence:
                # Add a character to the current sequence if it's length is less than 3
                current_sequence += char
                if len(current_sequence) == 3:
                    # Current sequence has reached max length, so add the corresponding special character to the output if current_sequence is found in the dictionary else add all the letters in current sequence to the output
                    output += replacement_dict.get(current_sequence, current_sequence)
                    # Important reset
                    current_sequence = ""
                    in_sequence = False
            else:
                # Add character to output as character doesn't begin a null sequence and current_sequence is empty 
                output += char
        return output