Assignments » File Handling »  Set1

File Handling - Text File

[Set – 1]

1. Write a program that writes 10 random numbers to a file 'numbers.txt'. Each random number should be in the range of 1 through 100. Solution

import random

# Open the file in write mode
file = open("numbers.txt", "w")

# Generate and write random numbers to the file
for i in range(10):
    number = random.randint(1, 100)
    file.write(str(number) + "\n")

# Close the file after writing
file.close()

2. Write a program that reads and display all of the numbers stored in the file numbers.txt (created in question 1) and calculates their total. Solution

# open the file in read mode
file = open("numbers.txt", "r")

total = 0

# read and display all numbers from the file
for line in file:
    number = int(line.strip())
    total += number
    print(number)

# close the file after reading
file.close()

print("Total:", total)

3. Write a function, digit_count() in Python that counts and displays the number of digits in the text file named 'sample.txt'. For example, if the content of 'sample.txt' is as follows :

The team achieved a milestone in 2023. They completed a multi-million-dollar project ahead of schedule. Stakeholders were impressed with a 98% success rate.

The function should display the output as 6 Solution

def digit_count():
    file = open('sample.txt', 'r')
    content = file.read()
    count = 0

    for char in content:
        if char.isdigit():
            count += 1

    print(count)

    file.close()

# Call the function
digit_count()

4. Write a function lines_count() that reads lines from a text file named 'zen.txt' and displays the lines that begin with any vowel. Assume the file contains the following text and already exists on the computer's disk:

Beautiful is better than ugly.
Explicit is better than implicit.
Simple is better than complex.
Complex is better than complicated.

The lines_count() function should display the output as:
Explicit is better than implicit.
Solution

def lines_count():
    vowels = ['a', 'e', 'i', 'o', 'u']
    file = open('zen.txt', 'r')
    
    for line in file:
        # remove trailing newline character 
        line = line.rstrip()
        # Check if the line starts with any vowel
        if line[0].lower() in vowels:
            print(line)
    
    file.close()

# Call the function
lines_count()

5. Assume that the file 'notes.txt' containing some text and exists on the computer’s disk. Write a program that display only those words from 'notes.txt' file whose length is more than seven. Keep in mind that any punctuation marks at the beginning or end of a word should also be considered as part of the word's length. Solution

file = open("notes.txt", "r")
content = file.read()

# Split the content into words
words = content.split()

# Display words with length more than seven characters
print("Words with length more than seven:")
for word in words:
    if len(word) > 7:
        print(word)

# close the file
file.close()

6. Write a function last_digit_words() in Python to count the words ending with a digit in a text file "notes.txt". For example, if the file content is as follows :

The Computer6 hums softly as I sit with a Book3 in hand, diving into a world of imagination. Outside, my friends gather at House9 and I quickly grab my Pen2 to jot down the address.

The expected output should be:
Number of words ending with a digit are 4 Solution

def last_digit_words():

    file = open("notes.txt", 'r')
    content = file.read()    
    words = content.split()
    count = 0

    for word in words:
        if word[-1].isdigit():
            count += 1

    print("Number of words ending with a digit are", count)
    file.close()

last_digit_words()

7. Assume that a file 'names.txt' containing a series of names (as strings) exists on the computer’s disk. Write a function, first_five() that displays only the first five lines of the file’s contents. If the file contains less than five lines, it should display the file’s entire contents. Solution

def first_five():
    # Read the content of the file
    file = open("names.txt", "r")
    lines = file.readlines()

    # Display the first five lines or the entire content if the file
    print("First five lines of the file's contents:")
    for line in lines[:5]:
        print(line.rstrip())

    # close the file
    file.close()

# Call the function
first_five()

8. Write a Python program that reads a text file and prints its contents in reverse order (from the last line to the first line). Solution

file = open(file_path, 'r')
 lines = file.readlines()
 rlines = reversed(lines)
 for line in rlines:
        print(line.rstrip())
file.close()

9. Write the definition of a Python function named long_lines( ) which reads the contents of a text file named 'lines.txt' and displays those lines from the file which have at least 8 words in it. For example, if the content of 'lines.txt' is as follows :

Flat is better than nested.
Sparse is better than dense.
Readability counts.
Special cases aren't special enough to break the rules.

The output should be:
Special cases aren't special enough to break the rules. Solution

def long_lines():
    file = open("lines.txt", 'r')
    for line in file:
        words = line.split()
        if len(words) >= 8:
            print(line.strip())
    file.close()
    
# call the function
long_lines()

10. Assume that a file named 'feedback.txt' contains student feedback in the following format:

Positive: Saksham improved grades, more confident now.
Negative: Arav needs better time management for coursework.
Negative: Samar should work on communication in group activities.
Negative: Soham could benefit from asking more questions in class.
Positive: Sakshi excels academically, a great team player.

Write a Python function named feedback_analysis() to calculate and display the following information:
Total feedbacks stored in the file.
Count of positive feedbacks.
Count of negative feedbacks. Solution

def feedback_analysis():
    total = 0
    positive = 0
    negative = 0

    file = open('feedback.txt', 'r')
    for line in file:
        total += 1
        if line.startswith('Positive'):
            positive += 1
        elif line.startswith('Negative'):
            negative += 1

    file.close()

    print("Total feedbacks stored in the file:", total)
    print("Count of positive feedbacks:", positive)
    print("Count of negative feedbacks:", negative)

# Calling function
feedback_analysis()

11. Create a Python function make_copy() that reads a text file 'input.txt' and writes its contents to a new file 'output.txt', capitalizing the first letter of each word. For example, if 'input.txt' contains the following content:

"In the world of programming, there are no limits to what you can achieve. Aim high!"
The 'output.txt' should contain:
"In The World Of Programming, There Are No Limits To What You Can Achieve. Aim High!" Solution

N = int(input("Enter a positive integer: "))
sum_reciprocals = 0.0

for num in range(1, N + 1):
    sum_reciprocals += 1 / num

print("The sum of reciprocals from 1 to", N, "is:", "{:.2f}".format(sum_reciprocals))