screenshot of input and output import stringdef readfile(fname):pass#Open the file for reading#Read the contents as one long string#Close the file#Remove the punctuation#Return the lower-case contentsdef main():filename = "gb.txt"#Use readfile() to get the text#Create an empty list to hold the unique words#Split the text into a list of words (split on whitespace)#For each word in the list of words#If the word is not in the unique word list#Add it (append it to the unique word list)#Print the number of unique words#Print the unique wordsmain() 4. Write a program that counts the number of unique words in a text file; use gb.txt as a test file - butyour program should work for any file if the filename is changed. Write a function readfile() thatreads the file, removes punctuation, and returns the contents as a lower case string. In main, countthe number of unique words and print that number and the words that only occur one time.Save & RunLoad HistoryShow CodeLens1 import string23 def readfile (fname) :4pass#Open the file for reading6#Read the contents as one long string7#Close the file#Remove the punctuation#Return the lower-case contents1011 def main ():12filename = "gb.txt"13#Use readfile () to get the text14#Create an empty list to hold the unique words#Split the text into a list of words (split on whitespace)#For each word in the list of words151617#If the word is not in the unique word list18#Add it (append it to the unique word list)19#Print the number of unique words20#Print the unique words2122 main ()23

The definition of the function readfile() is shown below. def readfile(fname):…

Answered: 4. Write a program that counts the…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

screenshot of input and output

import string

def readfile(fname):
pass
#Open the file for reading
#Read the contents as one long string
#Close the file
#Remove the punctuation
#Return the lower-case contents

def main():
filename = "gb.txt"
#Use readfile() to get the text
#Create an empty list to hold the unique words
#Split the text into a list of words (split on whitespace)
#For each word in the list of words
#If the word is not in the unique word list
#Add it (append it to the unique word list)
#Print the number of unique words
#Print the unique words

main()

4. Write a program that counts the number of unique words in a text file; use gb.txt as a test file - but
your program should work for any file if the filename is changed. Write a function readfile() that
reads the file, removes punctuation, and returns the contents as a lower case string. In main, count
the number of unique words and print that number and the words that only occur one time.
Save & Run
Load History
Show CodeLens
1 import string
2
3 def readfile (fname) :
4
pass
#Open the file for reading
6
#Read the contents as one long string
7
#Close the file
#Remove the punctuation
#Return the lower-case contents
10
11 def main ():
12
filename = "gb.txt"
13
#Use readfile () to get the text
14
#Create an empty list to hold the unique words
#Split the text into a list of words (split on whitespace)
#For each word in the list of words
15
16
17
#If the word is not in the unique word list
18
#Add it (append it to the unique word list)
19
#Print the number of unique words
20
#Print the unique words
21
22 main ()
23

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