Question

MINDTAP From Cengage Programming Exercise 4.3 decrypt.pyencrypt.py Instructions 1Modify the progran below Modify the scripts of Projects 1 and 2 to encrypt and decrypt entire files of text. 4 Probject 4.1 5 6 Encypts an input string of the ASCII characters and prints 7 the result. The other input is the distance value An example of the program interface is shown below: Enter the input file nane: encrypted.txt Enter the output file nane: a Enter the distance value: 3 9 10 # The ASCII values range from through 127 12 plainText input("Enter a nessage:" 13 distance-int(input("Enter the distance value: ")) 14 code 15 for ch in plainText 16 ordvalue = ord(ch) 17 18 if cipherValue> 127: 19 20 codechr(cipherValue) 21 print (code) Grading As you complete the instructions above you can use the Test button to check if the lab tests are passing. Once you are satisfied with the results, use the Grade button to save your score cipherValue ordValue distance cipherValue -distance (127-ordValue 1)
Modify the scripts of Projects 1 and 2 to encrypt and decrypt entire files of text. An example of the program interface is shown below:

both images are from one question. I need it in python, please.

Answer 1

Note: Please indent the code as per the screenshots.

Code Screenshots (encrypt.py):

$#Prompt the user to enter #the name of the input file infileName input (Enter the input file name: ) #Prompt the user to enter #the name of the output file. outFileNameinput (Enter the output file name: ) #Prompt the user to enter #the distance value. distance int (input (Enter the distance value: )) #Open the input file to be read. inFileopen (infileName,r) #Open the output file. outFile open (outFileName, w) code #Read the data in the file haracter by character. for line in inFile.readlines ): flag 0 if An in line: flag 1 line - line.stripn) for ch in line: oravalue ord (ch) ciphervalue ordvalue + distance if cipherValue > 127: cipherValuedistance - (127 - ordvalue 1) code chr (cipherValue) if flag-1: code += \n #Write the data #to the file. outFile.write (code)$

Sample Input File (encrypted.txt):

Sample Output:

Sample Output File(out.txt):

Code To Copy (encrypt.py):

#Prompt the user to enter
#the name of the input file.
infileName = input("Enter the input file name: ")

#Prompt the user to enter
#the name of the output file.
outFileName = input("Enter the output file name: ")

#Prompt the user to enter
#the distance value.
distance = int(input("Enter the distance value: "))

#Open the input file to be read.
inFile = open(infileName,"r")

#Open the output file.
outFile = open(outFileName,"w")
code = ""

#Read the data in the file
#character by character.
for line in inFile.readlines():
flag = 0
if '\n' in line:
flag = 1
line = line.strip('\n')
for ch in line:
ordValue = ord(ch)
cipherValue = ordValue + distance
if cipherValue > 127:
cipherValue = distance - (127 - ordValue + 1)
code += chr(cipherValue)
if flag == 1:
code += '\n'

#Write the data
#to the file.
outFile.write(code)

#Close the files.
inFile.close()
outFile.close()

Code Screenshots (decrypt.py):

Sample input file (out.txt):

Sample Output:

Sample Output file (decry.txt):

Code To Copy (decrypt.py):

#Define the function to
#decode the cipher text.
def decode_ceasor(encrypted_text, distance):
output = ""
for i in encrypted_text:
x = ord(i) - (distance % 26)
if i.isalpha():
if i.isupper():
if x > ord('Z'):
x = x - 26
elif x < ord('A'):
x = x + 26
output += chr(x)
else:
output += chr(x)
return output

#Prompt the user to enter
#the name of the input file.
infileName = input("Enter the input file name: ")

#Prompt the user to enter
#the name of the output file.
outFileName = input("Enter the output file name: ")

#Prompt the user to enter
#the distance value.
distance = int(input("Enter the distance value: "))

#Open the input file to be read.
inFile = open(infileName,"r")

#Open the output file.
outFile = open(outFileName,"w")

decrypted_text = ""

for encrypted_text in inFile:
flag = 0
if '\n' in encrypted_text:

flag = 1
  
#Read the text from the file.
encrypted_text = encrypted_text.strip('\n')
decrypted_text += decode_ceasor(encrypted_text,distance)
if flag == 1:
decrypted_text += '\n'
  

#Call the function decode_ceaser()
# and write the decoded
#text into the output file.
outFile.write(decrypted_text)

#Close the file.
outFile.close()
inFile.close()