Write a program that opens a user-specified text file and then displays a list of all the unique words found in the file

computer science


Part 1:  

Write a program that opens a user-specified text file and then displays a list

of all the unique words found in the file. In the end include a count of how

many unique words were found.   Remove punctuation. Use the attached

file to test your program; there are 138 unique words in the file.

Hint:  Create a dictionary using the words in the file as keys.   Before

adding a new key, use 'in' to determine if it is already in the dictionary.


Part 2:  

Modify the program to count and display the frequency of each word. 

Which word appears most often in the Gettysburg Address?

Hint:  Use the value of each dictionary item to count the number of times

each word appears.  

Four score and seven years ago our fathers brought forth on this continent a

new nation, conceived in liberty and dedicated to the proposition that all

men are created equal.

Now we are engaged in a great civil war, testing whether that nation or any

nation so conceived and so dedicated, can long endure. We are met on a great

battlefield of that war. We have come to dedicate a portion of that field, as

a final resting place for those who here gave their lives that that nation

might live. It is altogether fitting and proper that we should do this.

But, in a larger sense, we can not dedicate, we can not consecrate, we can

not hallow this ground. The brave men, living and dead, who struggled here,

have consecrated it, far above our poor power to add or detract. The world

will little note, nor long remember what we say here, but it can never forget

what they did here. It is for us the living, rather, to be dedicated here to

the unfinished work which they who fought here have thus far so nobly

advanced. It is rather for us to be here dedicated to the great task

remaining before us that from these honored dead we take increased devotion

to that cause for which they gave the last full measure of devotion; that we

here highly resolve that these dead shall not have died in vain; that this

nation, under God, shall have a new birth of freedom; and that government of

the people, by the people, for the people, shall not perish from the earth.

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