Feature Overview

The application handles these operations:

1. Insert Record: Capture unique ID, full name, years, and sex too create a new entry.
2. Erase Record: Locate and remove a specific entry using its unique identifier.
3. Update Details: Change the attributes of an existing entry based on its ID.
4. Lookup Info: Search for an entry using either the ID or the name.
5. List All: Print every record currently held in memory.
6. Persist Data: Write the current state of records to a text file.
7. Terminate: Close the application loop.

Core Implementation

The logic relies on two main classes: one representing the individual record and another managing the collection of records.

class Scholar:
    def __init__(self, uid, full_name, years, sex):
        self.uid = uid
        self.full_name = full_name
        self.years = years
        self.sex = sex

    def print_details(self):
        print(f"ID: {self.uid}")
        print(f"Name: {self.full_name}")
        print(f"Age: {self.years}")
        print(f"Gender: {self.sex}")


class ScholarRegistry:
    def __init__(self):
        self.records = []

    def insert(self, scholar_obj):
        self.records.append(scholar_obj)

    def erase(self, target_id):
        initial_count = len(self.records)
        self.records = [s for s in self.records if s.uid != target_id]
        if len(self.records) < initial_count:
            print("Removal complete.")
        else:
            print("ID not located.")

    def edit(self, target_id, new_name, new_age, new_gender):
        for s in self.records:
            if s.uid == target_id:
                s.full_name = new_name
                s.years = new_age
                s.sex = new_gender
                print("Update successful.")
                return
        print("ID not located.")

    def find(self, search_term):
        found = False
        for s in self.records:
            if search_term == s.uid or search_term.lower() in s.full_name.lower():
                s.print_details()
                found = True
        if not found:
            print("No matches found.")

    def show_all(self):
        if not self.records:
            print("Registry is empty.")
        else:
            for idx, s in enumerate(self.records, 1):
                print(f"--- Record {idx} ---")
                s.print_details()

    def export_to_file(self, path):
        try:
            with open(path, 'w') as f:
                for s in self.records:
                    f.write(f"{s.uid}|{s.full_name}|{s.years}|{s.sex}\n")
            print("Data dumped to file.")
        except IOError as e:
            print(f"Write error: {e}")

    def import_from_file(self, path):
        self.records = []
        try:
            with open(path, 'r') as f:
                for line in f:
                    parts = line.strip().split('|')
                    if len(parts) == 4:
                        self.records.append(Scholar(parts[0], parts[1], int(parts[2]), parts[3]))
            print("Data loaded into memory.")
        except FileNotFoundError:
            print("Storage file missing; starting fresh.")

Usage Workflow

The following script demonstrates the interactive menu for controlling the registry.

app = ScholarRegistry()
app.import_from_file("scholars.txt")

while True:
    print("\n--- Scholar Registry ---")
    print("1. Insert Record")
    print("2. Erase Record")
    print("3. Edit Record")
    print("4. Find Record")
    print("5. List All Records")
    print("6. Save to Disk")
    print("7. Exit")
    
    action = input("Select option: ")

    if action == "1":
        uid = input("Unique ID: ")
        name = input("Full Name: ")
        age = int(input("Age: "))
        gender = input("Gender: ")
        app.insert(Scholar(uid, name, age, gender))
        print("Record added.")

    elif action == "2":
        target = input("ID to remove: ")
        app.erase(target)

    elif action == "3":
        target = input("ID to edit: ")
        name = input("New Name: ")
        age = int(input("New Age: "))
        gender = input("New Gender: ")
        app.edit(target, name, age, gender)

    elif action == "4":
        term = input("Search by ID or Name: ")
        app.find(term)

    elif action == "5":
        app.show_all()

    elif action == "6":
        app.export_to_file("scholars.txt")

    elif action == "7":
        break

    else:
        print("Invalid selection.")