What operations can I perform?

You can perform various operations on text files like data_file.txt and test_file.txt. Here are some common operations:

1. Reading Files: Load the contents of the files into your program.

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

2. Writing to Files: Save data to the files.

   with open('test_file.txt', 'w') as file:
       file.write("Some new content")

3. Appending Data: Add data to the end of a file.

   with open('data_file.txt', 'a') as file:
       file.write("\nAdditional content")

4. Comparing Files: Check if the contents of the files are the same.

   with open('data_file.txt', 'r') as file1, open('test_file.txt', 'r') as file2:
       are_equal = file1.read() == file2.read()

5. Searching for Content: Look for specific strings or patterns in the files.

   with open('data_file.txt', 'r') as file:
       if "search_term" in file.read():
           print("Found!")

6. Sorting Lines: Read lines from a file and sort them.

   with open('data_file.txt', 'r') as file:
       sorted_lines = sorted(file.readlines())

7. Data Processing: Process the data (e.g., parsing, filtering).

   with open('data_file.txt', 'r') as file:
       processed_data = [line.strip() for line in file if line.strip()]

Feel free to ask if you need examples for a specific operation!