Question

write a python program that prompts the user for a name of a text file, opens that file for reading , and tracks the unique words in a file and counts how many times they occur in the file. Your program should output the unique words and how often they occur in alphabetical order. Negative testing for a file that does not exist and an empty file should be implemented.

Answer 1

#taking the file name as input from the user
filename = input("enter name of the file:\t")
#the try block is to print the exception if the file doesn't exist
try:
   #opening the file for reading in read mode
   f = open(filename, "r")
   #it will take all the lines in the file as a list
   lines = list(f)
   #a dictionary to keep track of frequency of each word in the file
   d = {}
   #iterate over the list
   for i in lines:
       #as the element in the list is a line (means sentence) split the sentence into words
       temp = i.split()
       #for each word in the sentence add it into the dictionary
       for j in temp:
           #remove dot if it exist in the end of the word(like word.)
           j = j.rstrip(".")
           #if the word is not present in the dictionary add it to it and make it frequency as 1
           if j not in d:
               d[j] = 1
           #if the word is present in the dictionary increment its frequency
           else:
               d[j] += 1
   #sort the keys in the dictionary
   s_d = sorted(d.keys())
   #for each word in the sorted list print word and its frequency
   for i in s_d:
       print("{} {}".format(i, d[i]))
except:
   print("file doesn't exist")

If you have any doubts please comment and please don't dislike.

Activities Text Editor Wed 00:10 Open A unique.py -Desktop Save file.txt unique.py filename = input("enter name of the file: \t") try: f = open(filename, "1") lines = list(f) d = {} for i in lines: temp = i.split() for j in temp: j = j.rstrip(".") if j not in d: d[j] = 1 else: d[j] += 1 s_d = sorted(d.keys()) for i in s_d: print("{} {}".format(i, d[i])) except: print("file doesn't exist") Python Tab Width: 8 Ln 15, Col 20 INS

Activities Terminal Wed 00:10 deepika@deepika-TravelMate-P243-M: -/Desktop File Edit View Search Terminal Help deepika@deepika-TravelMate-P243-M:-/Desktop$ python3 unique.py enter name of the file: file.txt a 1 contains 1 data 1 file 1 is 1 it 1 this 1 deepika@deepika-TravelMate-P243-M:~/Desktops AU COWO

Activities Text Editor Open A Wed 00:10 file.txt /Desktop Save = 0 file.txt unique.py this is a file. it contains data. Plain Text Tab Width: 8 Ln 1, Col 34 INS