def transform_file_data(input_filepath, output_filepath, transform_function):

"""

Transforms data from an input file using a provided function and writes the transformed data to an output file.

Args:

input_filepath (str): The path to the input file.

output_filepath (str): The path to the output file.

transform_function (function): A function that takes a line from the input file as input and returns the transformed line.

This function should handle string processing.

"""

try:

with open(input_filepath, 'r') as infile, open(output_filepath, 'w') as outfile:

for line in infile:

transformed_line = transform_function(line.strip()) # Remove leading/trailing whitespace

outfile.write(transformed_line + '\n') # Add newline character

except FileNotFoundError:

print(f"Error: Input file not found at {input_filepath}")

except Exception as e:

print(f"An error occurred: {e}")

if __name__ == '__main__':

#Example Usage

def example_transform(line):

"""Example transformation: convert to uppercase."""

return line.upper()

input_file = 'input.txt'

output_file = 'output.txt'

#Create a sample input file

with open(input_file, 'w') as f:

f.write("This is a line.\n")

f.write("Another line here.\n")

f.write("And a third line.\n")

transform_file_data(input_file, output_file, example_transform)