Automatic resource cleanup in Python - Mini Project: Build & Apply

Automatic resource cleanup

📖 Scenario: Imagine you are writing a program that reads data from a file. It is important to close the file after reading to free up system resources. Python provides a way to automatically close files using the with statement.

🎯 Goal: You will create a program that opens a file, reads its content, and automatically closes the file using the with statement.

📋 What You'll Learn

Create a text file named data.txt with some sample text.

Use the with statement to open the file.

Read the content of the file inside the with block.

Print the content after reading.

Ensure the file is automatically closed after reading.

💡 Why This Matters

🌍 Real World

Automatically closing files prevents errors and frees system resources, which is important in programs that handle many files or large data.

💼 Career

Understanding automatic resource cleanup is essential for writing reliable and efficient code in software development, data processing, and system programming.

1

Create the text file data.txt

Create a text file named data.txt and write the exact text Hello, this is a sample file. inside it.

Python

# Create the file 'data.txt' with the text
# Your code here

Need a hint?

Use open with mode 'w' to write to the file.

2

Set up the with statement to open the file

Write a with statement to open the file data.txt in read mode using the variable file.

Python

with open('data.txt', 'w') as file:
    file.write('Hello, this is a sample file.')

# Open 'data.txt' in read mode using 'with' and variable 'file'
# Your code here

Need a hint?

Use open with mode 'r' inside a with statement.

3

Read the content inside the with block

Inside the with block, read the content of the file using file.read() and store it in a variable called content.

Python

with open('data.txt', 'w') as file:
    file.write('Hello, this is a sample file.')

with open('data.txt', 'r') as file:
    # Read the file content into 'content'
    # Your code here

Need a hint?

Use file.read() to get all text from the file.

4

Print the content after reading

Write a print statement to display the variable content.

Python

with open('data.txt', 'w') as file:
    file.write('Hello, this is a sample file.')

with open('data.txt', 'r') as file:
    content = file.read()

# Print the content variable
# Your code here

Need a hint?

Use print(content) to show the text.