How do I add file handling to a Python student records program?

File handling turns a temporary student records program into one that can store data between runs. The assignment usually expects you to separate the program logic from the file input/output logic, so the code is easier to test.

What the question is asking

The task is asking you to persist records. You should decide a file format, load existing records when the program starts, update records in memory, and save them safely before exit or after each change.

Key concepts to cover

• CSV or JSON format
• File read and write modes
• Functions for load and save
• Input validation
• Error handling
• Unique student ID
• Testing file operations

CSV or JSON?

CSV is simple for table-like data such as student ID, name, course and mark. JSON is better if each student has nested data, such as multiple modules or contact details.

Suggested logic

textstart program
load records from file
show menu
add/search/update/delete records
validate input
save records to file
exit

Sample questions and short answers

1. What if the file does not exist?

Handle it gracefully by starting with an empty records list and creating the file when saving.

2. Should every operation write to the file?

Either save after each change or save when the user exits. Saving after each change is safer for beginner assignments.

3. Why use functions?

Functions such as load_records, save_records and find_student keep the program organised and easier to test.

4. What should I validate?

Check required fields, unique student ID, numeric marks and sensible mark ranges.

Common student mistakes

• Writing all code in one long loop
• Not handling missing files
• Losing data by opening in write mode too early
• Not validating marks
• Duplicating student IDs

Related questions

• How do I write a Python program to manage student records?
• Why does my Python function change my list outside the function?
• How do I explain recursion using factorial and Fibonacci in Python?

Academic use note

Use this as a design guide. Write your own code and include test cases showing that records persist after restarting the program.

Sources and further reading

• Python documentation: Reading and writing files
• Python documentation: CSV file reading and writing