Transform a Text File to Uppercase - Python Programming Exercise

In this exercise, you will develop a Python program that reads the contents of a text file and writes it to a new file, converting all lowercase letters to uppercase. This exercise is perfect for practicing file handling, string manipulation, and loops in Python. By implementing this program, you will gain hands-on experience in handling file operations, string manipulation, and loops in Python. This exercise not only reinforces your understanding of file handling but also helps you develop efficient coding practices for managing user interactions.

Exercise

Transform A Text File To Uppercase

Objective

Develop a Python program that reads the contents of a text file and writes it to a new file, converting all lowercase letters to uppercase.

Example Python Exercise

Show Python Code

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# Define a function to convert the text to uppercase and write to a new file
def convert_to_uppercase(input_filename, output_filename):
    try:
        # Open the input file in read mode
        with open(input_filename, 'r') as infile:
            # Read the contents of the file
            content = infile.read()
        
        # Convert the content to uppercase
        content_uppercase = content.upper()
        
        # Open the output file in write mode
        with open(output_filename, 'w') as outfile:
            # Write the uppercase content to the new file
            outfile.write(content_uppercase)
        
        print("File has been successfully converted to uppercase and saved as", output_filename)
    except FileNotFoundError:
        print(f"The file {input_filename} does not exist.")
    except Exception as e:
        print(f"An error occurred: {e}")

# Call the function with the input and output file names
input_file = "example.txt"  # Example input file
output_file = "example_uppercase.txt"  # Output file for the uppercase content

convert_to_uppercase(input_file, output_file)

# Define a function to convert the text to uppercase and write to a new file
def convert_to_uppercase(input_filename, output_filename):
    try:
        # Open the input file in read mode
        with open(input_filename, 'r') as infile:
            # Read the contents of the file
            content = infile.read()
        
        # Convert the content to uppercase
        content_uppercase = content.upper()
        
        # Open the output file in write mode
        with open(output_filename, 'w') as outfile:
            # Write the uppercase content to the new file
            outfile.write(content_uppercase)
        
        print("File has been successfully converted to uppercase and saved as", output_filename)
    except FileNotFoundError:
        print(f"The file {input_filename} does not exist.")
    except Exception as e:
        print(f"An error occurred: {e}")

# Call the function with the input and output file names
input_file = "example.txt"  # Example input file
output_file = "example_uppercase.txt"  # Output file for the uppercase content

convert_to_uppercase(input_file, output_file)

Output

If the example.txt file contains:
Hello world!
This is a test.

After running the program, the content of example_uppercase.txt will be:

HELLO WORLD!
THIS IS A TEST.

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Transform a Text File to Uppercase - Python Programming Exercise

Category

Managing Files

Exercise