Question

Python File

program 5: Word Frequencies (Concordance)    20 pts

1. Use a text editor to create a text file (ex: myPaper.txt) It should contain at least 2 paragraphs with around 200 or more words.

2. Write a Python program (HW19.py) that

• asks the user to provide the name of the text file. Be SURE to check that it exists!
  Do NOT hard-code the name of the file! Use the entry provided by the user!
• read from the text file
• NOTE: (write your program so that it ONLY works if it reads from the file specified by the user).

3. Your program will produce a dictionary of words with the number of times each occurs. It maps a word to the number of times the word occurs

• Key: a word
• Value: the number of times the word occurs in the text. The report should be an ALPHABETIZED output table, listing the word and the number of occurrences.

NOTES:

• The input sequence can be words, numbers or any other immutable Python object, suitable for a dict key.
  
• Ignore case – apple is the same as Apple is the same as APPLE, etc.
  
• Discard all punctuation and extra white space (newlines, tabs, blanks, etc.).
  
• Put the words into a dictionary. The first time a word is seen, the frequency is 1. Each time the word is seen again, increment the frequency. NOTE: you are REQUIRED to use the dictionary class for this assignment.
  
• Produce a frequency table. To alphabetize the frequency table, extract just the keys and sort them. This sorted sequence of keys can be used to extract the counts from the dict.
  
• Make sure that your output (the table) is formatted so that the columns are aligned, and so that there are titles for each column.
  
• Be sure to modularize your code, using functions appropriately.
• The main function should be clean and easy to read, calling the functions with meaningful names. Pass parameters – do not use global variables.
  

BONUS +5 pts:

• Create a menu-driven front-end to this application.
  • First, populate the dictionary from the file
  • Next, provide a menu that allows the user to
    • Add words to the dictionary
              after asking the user for the word to add
              Note: the count should increase if the word is already there)
    • Check if a word is already in the dictionary
    • Delete a word from the dictionary after asking the user for the word to delete
    • Print the dictionary entries in table form as described above.
      
• Allow the user to continue using the menu until they choose the option to quit.

Answer 1

from os import path
import sys
def fileExists(fileName):
    a=path.isfile(fileName)
    if(a):
        return True
    else:
        return False
    
def readWords(fname):
    f = open(fname, "r")
    data = f.read()
    words=data.split()
    return words

def populateDictionary(words):
    d={}
    for i in words:
        d=addWordToDictionary(i, d)
    return d
def addWordToDictionary(i,d):
    punctuations = '''!()-[]{};:'"\,<>./?@#$%^&*_~'''
    i=i.casefold()
    for p in i:
        if p in punctuations:
            i=i.replace(p,"")
    if i in d:
        d[i]=d[i]+1
    else:
        d[i]=1
    return d
    
def checkDictionary(i,d):
    i=i.casefold()
    if i in d:
        return True
    else:
        return False
def deleteWordInDictionary(i,d):
    e=checkDictionary(i, d)
    if(e):
        d.pop(i)
        return True
    else:
        return False

def printDictionary(d):
    print("{:<15} {:<15}".format("Word","Frequency"))
    for i in sorted(d):
        print("{:<15} {:<15}".format(i,d[i]))

def menu(s):
    if(int(s)==1):
        print("Enter the word to add to the dictionary:")
        r=input()
        addWordToDictionary(r, d1)
        print("After adding word to dictionary:")
        printDictionary(d1)
    elif(int(s)==2):
        print("Enter the word to check")
        c=input()
        c1=checkDictionary(c, d1)
        if(c1):
            print("The word exists in the dictionary")
        else:
            print("The word does not exists in the dictionary")
            
    elif(int(s)==3):
        print("Enter the word to delete from dictionary:")
        d2=input()
        q3=deleteWordInDictionary(d2,d1)
        if(q3):
            print("The word ",d2," is deleted from the dictionary")
            print("After deleting word from dictionary:")
            printDictionary(d1)
        else:
            print("The word does not exists in the dictionary.So it cannot be deleted")
    elif(int(s)==4):
        printDictionary(d1)
    elif(int(s)==5):
        sys.exit()
    else:
        print("Enter the valid option")
    
fname = input("Please enter the input file with extension: ")   
f=fileExists(fname)
if(f):
    words=readWords(fname)
    d1=populateDictionary(words)
    print("The frequency of words is ")
    printDictionary(d1)
    print("\nMENU\n")
    print("1.Add word to dictionary\n2.Check whether the word is already in the dictionary \n3.Delete the word from dictionary\n",
          "4.Print the entries in table form\n5.Quit the program\n Enter your option")
    s=input()
    while(s):
        menu(s)
        print("1.Add word to dictionary\n2.Check whether the word is already in the dictionary \n3.Delete the word from dictionary\n",
          "4.Print the entries in table form\n5.Quit the program\n Enter your option")
        s=input()
else:
    print("The entered file does not exists")
    
    
    

Screenshot of the code:

myPaper.txt file:

                All of us, at least once in our lives, have experienced our parents hollering at us for sitting idle. 
When they see us roaming around unnecessarily or sitting without any work, they seemingly ask don't we have better things to do? 
We always take it as unneeded screaming and fail to realize the deeper meaning it holds. Life spent doing constructive work, is life well spent. 
The great dramatist Shakespeare rightly observed that life should be measured by deeds, not years. Age is no criterion for the meaning of life. 
It is the actions, good deeds which give meaning to life and make man immortal. Long life is desired by all, but if one does not do any noble deeds,
 then such a life has no worth. Great leaders like Mahatma Gandhi, Lal Bahadur Shastri, Abraham Lincoln, Swami Vivekananda, Mother Teresa and many others
  are remembered even after so many years after their passing. People still take inspiration from their lifestyles and preachings. 
  It is only the great deeds of these leaders that have inspired many generations. 
                  A lily flower lives just for a day, but it is remembered for its fragrance and sweetness. 
Respect is earned by actions and not acquired by years. Existence becomes exciting when it is lived for others or when it does something beneficial 
to mankind. We generally work for the whole day, earn money and spend it on our needs. These are some common things that all do, but we should all do 
some noble deeds as well. We should share our smile, advice, cheer, and help with our fellow beings. These things may give them happiness and they may 
remember us when we are not around. Hence the saying, "We live in deeds, not in years," proves to be true.

Screenshot:

Screenshot of the output: