COSC 1306 Spring 2021 Assignment 11: Dictionary [1] Objectives: The purpose of this assignment is to practice dictionary usage and file reading and writing. The assignment will give you another chance...

Python assignment


COSC 1306 Spring 2021 Assignment 11: Dictionary [1] Objectives: The purpose of this assignment is to practice dictionary usage and file reading and writing. The assignment will give you another chance to use files for input and output. Since this is the last assignment, we will keep it very simple and short. [2] Description: There are two files to read from: a codebook and a message file. The codebook will encrypt a letter with another letter. Use the codebook to encrypt the message. The codebook and the paragraph to be encrypted will be given in two separate files. You can hardwire the two input file name in the program and output the encrypted paragraph to the console. If a letter is not given in the codebook, leave it as-is in the encrypted paragraph. For example, if the codebook includes three lines below: a:e e:c c:a If the paragraph to be encrypted is “It’s a nice day!”. The encrypted output should be: “It’s e niac dey!”. The following is what the algorithm should look like in the main program.  Build the codebook (as a dict)  Print the codebook in a table form  Read the message  Print the message  Encrypt the message  Print the encrypted message [3] Requirements: Clearly, you will need to write four functions according to the algorithms above. Assume the codebook is correct, i. e., you will be able to decode the message. Decoding is NOT a requirement of this assignment. No error checking is required. [3] Input and Output: See the sample output. The TA may test the program with a different codebook or message. [4] Deadline: Midnight, Monday, May 3, 2021. No late assignment will be accepted for this one. code_book.txt message.txt a:f f:c c:d d:l l:a b:e e:g g:h h:b y:i i:s s:t t:y A:X X:O O:S S:A n:p p:n t:o o:t An operating system (OS) is system software that manages computer hardware, software resources, and provides common services for computer programs. *** Letter to Code a -> f f -> c c -> d d -> l l -> a b -> e e -> g g -> h h -> b y -> i i -> s s -> t t -> o A -> X X -> O O -> S S -> A n -> p p -> n o -> t *** Original message: An operating system (OS) is system software that manages computer hardware, software resources, and provides common services for computer programs. *** Encrypted message: Xp tngrfosph titogm (SA) st titogm ttcowfrg obfo mfpfhgt dtmnuogr bfrlwfrg, ttcowfrg rgtturdgt, fpl nrtvslgt dtmmtp tgrvsdgt ctr dtmnuogr nrthrfmt.