Description
Exercise 5
This homework is designed to highlight the use of exceptions and simple text files within c. Other
skills learned through the course will also be utilized in developing the solution. You are not allowed to
use any Python-provided method or function named count() for this assignment, although you may
write your own.
Students will write a program that:
1. Accepts as user input the name of a file to process. If the named file does not exist, appropriate
error handing will occur and the name of the file will be again requested. This will repeat until
either a valid file name is entered or the string “ALL DONE” is entered as the file name. The
program will assume that the named file is an ordinary text file and not a pickled file. Use the
readline() function, not readlines(), to read the file.
2. The file will be processed ONE LINE AT A TIME:
a. Certain characters will be removed from the input. Using the string module, the
following statement will define which characters to remove:
(string.punctuation + string.whitespace).replace(‘ ‘, ”)
Note that the removal of a character should leave a space in its place and not change
the length of the input line. E.g., the string “12.34” would become the string “12 34”
not “1234”.
b. Once the specific characters are removed from the input, the remainder of the input
line will be split on “word” boundaries where words are separated with the space
character (‘ ‘).
c. Each “word” of the processed input will be stored in a dictionary as a key where the
value is the number of times that the word occurs in the input. However, if the “word”
is an integer, the word will not be stored in the dictionary and instead will be summed
so that the total of all integers in the processed file can be displayed.
3. One the file has been processed, the following information will be displayed:
a. The total of all integers in the file
b. The 5 most common words in the file
c. The 5 least common words in the file.
Note that it is very likely that there will be more than 5 words that are the “least common” in the file. In
this case, you should print any 5 of those least common words. For example, if there are 7 words with a
frequency of ‘1’, then listing any 5 of them will suffice, but only list 5.
Example output:
Enter filename for analysis: HW 5 gettysburg.txt
The total value of the integers: 1882
Top 5 most common words:
that: 13
the: 11
we: 10
here: 8
to: 8
5 least common words:
usa: 1
should: 1
full: 1
consecrate: 1
fathers: 1
>>>
