Write a Python program that reads text from a file, encrypts it with a Caesar Cipher, and displays the encrypted text. Do not process punctuation. Convert the original string to all lower-case before encrypting it.
# dictionary with key as alphabets value as numbers pairs d = { 'a': 0, 'b': 1, 'c': 2, 'd': 3, 'e': 4, 'f': 5, 'g': 6, 'h': 7, 'i': 8, 'j': 9, 'k': 10, 'l': 11, 'm': 12, 'n': 13, 'o': 14, 'p': 15, 'q': 16, 'r': 17, 's': 18, 't': 19, 'u': 20, 'v': 21, 'w': 22, 'x': 23, 'y': 24, 'z': 25 } list1 = [] # initilaize an empty list with open('filetext.txt', 'r') as f: # read file for i in f.readlines(): # for each line in file append it to the list1 for j in i.splitlines(): list1.append(j) n = int(input('Enter the value for shift key ')) # enter any number as shift key both sender and receiver should compromise on this key for line in list1: # for each line in list1 convert it to lower case letters str2 = '' for i in line.lower(): if i == ' ' or i == '!' or i == '@' or i == '#' or i == '$' or i == '%' or i == '&' or i == '*' or i == '^': # if i is any punctuation then append as is str2 += i else: jk = (d[i] + n) % 26 # else find the value for the letter for k, j in d.items(): # compare the value with the dict value if j == jk: # if both matches then get the key and append it to the str2 str2 += k print("The encrypted value for the word ", line.lower(), ' is ', str2, '\n')
filetext.txt file
Write a Python program that reads text from a file, encrypts it with a Caesar Cipher,...
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