[Solved]-Python Program Part Writing Series Functions Used Part Secret Message Encoder Program Func Q37201435

Python program

For this part you will be writing a series of functions that canbe used as part of a “secret message encoder” program. Here are thefunctions you will be writing as well as some sample code that youshould use to test your work.

# function: add_letters# input: a word to scramble (String) and a number of letters (integer)# processing: adds a number of random letters (A-Z; a-z) after each letter # in the supplied word. for example, if word=”cat” and num=1 # we could generate any of the following:# cZaQtR# cwaRts# cEaett# # if word=”cat” and num=2 we could generate any of the following:# cRtaHFtui# cnnaNYtjn# czAaAitym## output: returns the newly generated worddef add_letters(word, num): # function code goes here!

Sample Program

# define original word
original = “Hello!”

# loop to demonstrate the function
for num in range(1, 5):

# scramble the word using ‘num’ extra characters
scrambled = add_letters(original, num)

# output
print (“Adding”, num, “random characters to”, original, “->”,scrambled)

Sample Output

Adding 1 random characters to Hello! -> HdeulHlHom!t
Adding 2 random characters to Hello! -> HTLedklFNljioMH!bi
Adding 3 random characters to Hello! ->HHHZeZrflqSflzOiosNU!jBk
Adding 4 random characters to Hello! ->HFtRKeivFllRNlUlGTaooYwoH!JpXL
Hint: you will need to use a loop to generate the required # ofrandom characters, and you will (obviously) need to use some randomnumber functions as well. Think about the algorithm before youstart coding! Draw out the steps you think you need to take on apiece of paper. For example: “Start with the first character in thesource word. Then generate ‘num’ new random characters andconcatenate these characters. Then move onto the next character inthe source word and repeat the process”.

Once you have written the add_letters function you should beginto work on the next function (remove_letters) which will performthe reverse operation.

# function: remove_letters
# input: a word to unscramble (String) and the number of charactersto remove (integer)
# processing: the function starts at the first position in thesupplied word and keeps it.
# it then removes “num” characters from the word. the process isrepeated again
# if the word contains additional characters – the next characteris kept
# and “num” more characters are removed. For example, ifword=”cZaYtU” and
# num=1 the function will generate the following:
#
# cat (keeping character 0, removing character 1, keeping character2, removing
# character 3, keeping character 4, removing character 5)
#
# output: returns the newly unscrambed word
def remove_letters(word, num):

# function code goes here!

Sample Program

word1 = “HdeulHlHom!t”
word2 = “HTLedklFNljioMH!bi”
word3 = “HHHZeZrflqSflzOiosNU!jBk”
word4 = “HFtRKeivFllRNlUlGTaooYwoH!JpXL”

unscrambled1 = remove_letters(word1, 1)
print (“Removing 1 characer from”, word1, “->”,unscrambled1)

unscrambled2 = remove_letters(word2, 2)
print (“Removing 2 characers from”, word2, “->”,unscrambled2)

unscrambled3 = remove_letters(word3, 3)
print (“Removing 3 characers from”, word3, “->”,unscrambled3)

unscrambled4 = remove_letters(word4, 4)
print (“Removing 4 characers from”, word4, “->”,unscrambled4)

Sample Output

Removing 1 characer from HdeulHlHom!t -> Hello!
Removing 2 characers from HTLedklFNljioMH!bi -> Hello!
Removing 3 characers from HHHZeZrflqSflzOiosNU!jBk ->Hello!
Removing 4 characers from HFtRKeivFllRNlUlGTaooYwoH!JpXL ->Hello!
Hint: String slicing may make your life a lot easier when writingthis function!

Finally, write a function called “shift_characters” that shifts thecharacters in a word up or down based on their position ASCII table- here’s the IPO notation and a sample program:

# function: shift_characters
# input: a word (String) and a number of characters to shift(integer)
# processing: shifts each character in the supplied word to anotherposition in the ASCII
# table. the new position is dictated by the supplied integer. forexample,
# if word = “apple” and num=1 the newly generated word wouldbe:
#
# bqqmf
#
# because we added +1 to each character. if we were to call thefunction with
# word = “bqqmf” and num=-1 the newly generated word wouldbe:
#   
# apple
#
# because we added -1 to each character, which shifted eachcharacter down by
# one position on the ASCII table.
#
# output: returns the newly generated word
def shift_characters(word, num):
  
# function code goes here!

Sample Program

word1 = “apple”

newword1 = shift_characters(word1, 1)
print (word1, “shifted by +1 is”, newword1)

unscrambled1 = shift_characters(newword1, -1)
print (newword1, “shifted by -1 is”, unscrambled1)

word2 = “Pears are yummy!”

newword2 = shift_characters(word2, 2)
print (word2, “shifted by +2 is”, newword2)

unscrambled2 = shift_characters(newword2, -2)
print (newword2, “shifted by -2 is”, unscrambled2)

Sample Output

apple shifted by +1 is bqqmf
bqqmf shifted by -1 is apple
Pears are yummy! shifted by +2 is Rgctu”ctg”{woo{#
Rgctu”ctg”{woo{# shifted by -2 is Pears are yummy!
Hint: use the ord() and chr() functions!

Now you are going to write an “encoder / decoder” program thatmakes use of your three cryptographic functions. Begin by writing aprogram that continually asks the user to enter in an option – theuser can either (e)ncode a word, (d)ecode a word or (q)uit theprogram.

If the user chooses to encode a word you should do thefollowing:

• Ask the user for a positive number between 1 and 5. Repromptthem if necessary.
• Next, ask them to enter in a phrase that they want toencode.
• Finally, apply the following algorithm to their word:
  • Add ‘num’ random characters in between each letter of theirword (using your add_letters) function
  • Shift the word ‘num’ characters (using your shift_charactersfunction)

If the user chooses to decode a word you should do thefollowing:

• Ask the user for a positive number between 1 and 5. Repromptthem if necessary.
• Next, ask them to enter in a phrase that they want toencode.
• Finally, apply the following algorithm to their word:
  • Subtract ‘num’ random characters in between each letter oftheir word (using your remove_letters) function
  • Shift the word DOWN by ‘num’ characters (using yourshift_characters function)

Here’s a sample running of the program:

(e)ncode, (d)ecode or (q)uit: e
Enter a number between 1 and 5: 1
Enter a phrase to encode: apple
Your encoded word is: boqDqfmsfz

(e)ncode, (d)ecode or (q)uit: d
Enter a number between 1 and 5: 1
Enter a phrase to decode: boqDqfmsfz
Your decoded word is: apple

(e)ncode, (d)ecode or (q)uit: e
Enter a number between 1 and 5: 2
Enter a phrase to encode: Hello, World!! 🙂
Your encoded word is:JHmgn{nNYnukqFR.Fq”vEYOqYFt[n{lf|Y#mJ#kr”UT<cE+og

(e)ncode, (d)ecode or (q)uit: d
Enter a number between 1 and 5: 2
Enter a phrase to decode:JHmgn{nNYnukqFR.Fq”vEYOqYFt[n{lf|Y#mJ#kr”UT<cE+og
Your decoded word is: Hello, World!! 🙂

(e)ncode, (d)ecode or (q)uit: q

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Answer to Python program For this part you will be writing a series of functions that can be used as part of a “secret message enc… . . .