Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Problem A:
Write a Python program that reads a list of strings from a file "strings.txt" (see Figure 1) and prints
Palindrome words and non-palindrome words in separate columns (as shown in Figure 2)
Total number of words in the input file
• Palindrome Percentage, which is computed as follows
Number of palindrome words
Total number of words in the file
х 100
Enter filename: strings.txt
Palindrome
Non-Palindrome
redivider
deified
redivider
deified
sentences
sentences
noon
noon
words
words
civic
civic
radar
radar
different
different
definition
definition
context
context
level
level
reviver
reviver
malayalam
malayalam
palindrome
palindrome
genetics
genetics
hannah
hannah
ada
ada
anna
meaning
python
anna
meaning
python
Total numbers of words is 20
Figure 1 A sample input file
55.000 % of numbers are palindrome
Figure 2 A sample output using sample input in figurel
Each line in the input file contains one word as shown in Figure 1. Your program should read each
word and identify if it is a palindrome or not. A palindrome is a text that reads the same forward
(right to left) and backward (left to right).
Your program must define and use the following functions:
• isPalindrome(): receives a string and returns True if the string is palindrome, otherwise it
returns False. For example, if the string is “Python" the function will return False. If the string is
"Hannah" it returns True.
• displayHeader(): displays the header (the first three lines) shown in Figure 2
• main(): opens the input file "strings.txt" for reading, reads data from it, and calls the various
functions, and finally prints the results on screen formatted as shown in Figure 2. If the input
file is not found, an exception is raised and an error message must be displayed.
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Transcribed Image Text:Problem A: Write a Python program that reads a list of strings from a file "strings.txt" (see Figure 1) and prints Palindrome words and non-palindrome words in separate columns (as shown in Figure 2) Total number of words in the input file • Palindrome Percentage, which is computed as follows Number of palindrome words Total number of words in the file х 100 Enter filename: strings.txt Palindrome Non-Palindrome redivider deified redivider deified sentences sentences noon noon words words civic civic radar radar different different definition definition context context level level reviver reviver malayalam malayalam palindrome palindrome genetics genetics hannah hannah ada ada anna meaning python anna meaning python Total numbers of words is 20 Figure 1 A sample input file 55.000 % of numbers are palindrome Figure 2 A sample output using sample input in figurel Each line in the input file contains one word as shown in Figure 1. Your program should read each word and identify if it is a palindrome or not. A palindrome is a text that reads the same forward (right to left) and backward (left to right). Your program must define and use the following functions: • isPalindrome(): receives a string and returns True if the string is palindrome, otherwise it returns False. For example, if the string is “Python" the function will return False. If the string is "Hannah" it returns True. • displayHeader(): displays the header (the first three lines) shown in Figure 2 • main(): opens the input file "strings.txt" for reading, reads data from it, and calls the various functions, and finally prints the results on screen formatted as shown in Figure 2. If the input file is not found, an exception is raised and an error message must be displayed.
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