Lab 8: Dictionaries

Logistics

Due: Tuesday, October 17th no later than 11:59 p.m..
Partner Information: Complete this assignment individually or with a partner.
Submission Instructions (Working Alone): Upload your solution, renamed to YourFirstName-YourLastName-Lab8.py to the BrightSpace Lab 8 Dropbox.
Submission Instructions (Working With a Partner): Upload your solution, renamed to YourFirstName-YourLastName-PartnerFirstName-PartnerLastName-Lab8.py to the BrightSpace Lab 8 Dropbox.
Deadline Reminder: Once this deadline passes, BrightSpace will no longer accept your Python submission and you will no longer be able to earn credit. Thus, if you are not able to fully complete the assignment, submit whatever you have before the deadline so that partial credit can be earned.

ASCII (American Standard Code for Information Interchange) is a code developed in 1963 that is used to represent characters (such as the character 'X') with decimal numbers that range from 0 to 127. Here is the ASCII table.
Download lab8.py, rename it according to the instructions above, and make sure you understand it.
Download input file ascii-codes.txt to the same directory where you downloaded lab8.py. The first line in this comma-separated-values file shows the three pieces of information that will appear on each subsequent line: a Character (e.g. A), followed by a Code that is the corresponding ASCII decimal code (e.g. 65), followed by a Description of the Character (e.g. Uppercase A). In general, the character will be of length 1 such as the character X. However, there are two exceptions: " " is represented by space and "," is represented by comma.

Take the program above and modify it by adding the create_dictionary function. The parameter file_name is the name of a file that contains information about ASCII encodings. The format of this file is described in the bullet above. The function should return a dictionary where the keys are the characters and the values are the decimal encodings. Note: use " " and "," as keys instead of space and comma.
Take the program above and modify it by adding the translate function. The parameter sentence consists of an unknown number of characters. The parameter dictionary is the dictionary that was created by the create_dictionary function. The parameter file_name is the name of the output file where all output should be sent. In the output file, each character in sentence should appear on its own line, followed by a space, followed by its decimal representation. You may assume that all characters in a sentence will appear in the dictionary.
When the program is run, it should produce the following three output files: output-1.txt, output-2.txt and output-3.txt.

2 points - The create_dictionary function returns a dictionary that contains the correct binary code for each character of length one.
1 point - The create_dictionary function returns a dictionary that contains the correct binary code for " " and ",".
5 points - When your program is tested with different values for the variable sentence, characters that exist in the dictionary are translated correctly. For each unique character that is translated incorrectly, one point will be deducted.
1 point - The format of any output files created match the format of the sample output files exactly.
1 point - In a comment at the top of the python file that you submit, explain why the comma character and the space character are treated differently in ascii-codes.txt.

Work on Program 4 with your Program 4 partner, seeking feedback as necessary. As a reminder, Program 4 requires working with one classmate who is in your lab section. If you haven't already identified that partner, ask your lab TA to help you.