Opening and closing files in Python - Mini Project: Build & Apply

Opening and closing files

📖 Scenario: You want to save a short message to a text file on your computer. To do this, you need to open a file, write the message, and then close the file so the message is saved properly.

🎯 Goal: Learn how to open a file, write a message, and close the file in Python.

📋 What You'll Learn

Create a file object using the open function

Write a string message to the file

Close the file using the close method

Print a confirmation message after closing the file

💡 Why This Matters

🌍 Real World

Saving data like notes, logs, or user input to files is common in many programs.

💼 Career

Understanding file handling is essential for software development, data processing, and automation tasks.

1

Create a file object

Create a variable called file and open a file named message.txt in write mode using open('message.txt', 'w').

Python

# Create a file object called file and open 'message.txt' in write mode
# Your code here

Need a hint?

Use the open function with two arguments: the file name and the mode 'w' for writing.

2

Write a message to the file

Use the write method on the file object to write the string 'Hello, world!' to the file.

Python

file = open('message.txt', 'w')
# Write 'Hello, world!' to the file
# Your code here

Need a hint?

Call file.write() with the message string inside the parentheses.

3

Close the file

Close the file using the close method to save the changes.

Python

file = open('message.txt', 'w')
file.write('Hello, world!')
# Close the file
# Your code here

Need a hint?

Use file.close() to close the file after writing.

4

Print confirmation message

Print the message 'File saved successfully.' to confirm the file was closed.

Python

file = open('message.txt', 'w')
file.write('Hello, world!')
file.close()
# Print confirmation message
# Your code here

Need a hint?

Use print() to show the confirmation message.