hi can you explain these functions to me def encode(message): encode_dict = {'A': '.-', 'B': '-...', 'C': '-.-.', 'D': '-..', 'E': '.', 'F': '..-.', 'G': '--.', 'H': '....', 'I': '..', 'J': '.---', 'K': '-.-', 'L': '.-..', 'M': '--', 'N': '-.', 'O': '---', 'P': '.--.', 'Q': '--.-', 'R': '.-.', 'S': '...', 'T': '-', 'U': '..-', 'V': '...-', 'W': '.--', 'X': '-..-', 'Y': '-.--', 'Z': '--..', ' ': '.....'} encoded = ' '.join(encode_dict[i] for i in message.upper()) return encoded def decode(message): encode_dict = {'A': '.-', 'B': '-...', 'C': '-.-.', 'D': '-..', 'E': '.', 'F': '..-.', 'G': '--.', 'H': '....', 'I': '..', 'J': '.---', 'K': '-.-', 'L': '.-..', 'M': '--', 'N': '-.', 'O': '---', 'P': '.--.', 'Q': '--.-', 'R': '.-.', 'S': '...', 'T': '-', 'U': '..-', 'V': '...-', 'W': '.--', 'X': '-..-', 'Y': '-.--', 'Z': '--..', ' ': '.....'} decode_dict = {v: k for k, v in encode_dict.items()} decoded = ''.join(decode_dict[i] for i in message.split()) return decoded def process_lines(filename, mode): with open(filename, 'r') as f: msg = f.read() return msg def write_lines(lines): with open('results.txt', 'w') as f: f.writelines(lines) print("Output written to results.txt") def check_file_exists(filename): from os.path import exists file_exists = exists(filename) return file_exists

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

hi can you explain these functions to me

def encode(message):
encode_dict = {'A': '.-', 'B': '-...', 'C': '-.-.',
'D': '-..', 'E': '.', 'F': '..-.',
'G': '--.', 'H': '....', 'I': '..',
'J': '.---', 'K': '-.-', 'L': '.-..',
'M': '--', 'N': '-.', 'O': '---',
'P': '.--.', 'Q': '--.-', 'R': '.-.',
'S': '...', 'T': '-', 'U': '..-',
'V': '...-', 'W': '.--', 'X': '-..-',
'Y': '-.--', 'Z': '--..', ' ': '.....'}
encoded = ' '.join(encode_dict[i] for i in message.upper())
return encoded

def decode(message):
encode_dict = {'A': '.-', 'B': '-...', 'C': '-.-.',
'D': '-..', 'E': '.', 'F': '..-.',
'G': '--.', 'H': '....', 'I': '..',
'J': '.---', 'K': '-.-', 'L': '.-..',
'M': '--', 'N': '-.', 'O': '---',
'P': '.--.', 'Q': '--.-', 'R': '.-.',
'S': '...', 'T': '-', 'U': '..-',
'V': '...-', 'W': '.--', 'X': '-..-',
'Y': '-.--', 'Z': '--..', ' ': '.....'}
decode_dict = {v: k for k, v in encode_dict.items()}
decoded = ''.join(decode_dict[i] for i in message.split())
return decoded

def process_lines(filename, mode):
with open(filename, 'r') as f:
msg = f.read()
return msg

def write_lines(lines):
with open('results.txt', 'w') as f:
f.writelines(lines)
print("Output written to results.txt")

def check_file_exists(filename):
from os.path import exists
file_exists = exists(filename)
return file_exists

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