main.py

from collections import UserDict

class Field:
    def __init__(self, value):
        self.value = value

    def __str__(self):
        return str(self.value)

class Name(Field):
    pass

class Phone(Field):
    def __init__(self, value):
        if not value.isdigit() or len(value) != 10:
            raise ValueError("Invalid phone number format")
        super().__init__(value)

class Record:
    def __init__(self, name):
        self.name = Name(name)
        self.phones = []

    def add_phone(self, phone):
        self.phones.append(Phone(phone))

    def remove_phone(self, phone):
        self.phones = [p for p in self.phones if p.value != phone]

    def edit_phone(self, old_phone, new_phone):
        phone_found = False
        for phone in self.phones:
            if phone.value == old_phone:
                phone.value = new_phone
                phone_found = True
                break

        if not phone_found:
            raise ValueError(f"Phone {old_phone} not found in the record")


    def find_phone(self, phone):
        return next((p for p in self.phones if p.value == phone), None)

    def __str__(self):
        return f"Contact name: {self.name.value}, phones: {'; '.join(str(p) for p in self.phones)}"

class AddressBook(UserDict):
    def add_record(self, record):
        self.data[record.name.value] = record

    def find(self, name):
        return self.data.get(name)

    def delete(self, name):
        if name in self.data:
            del self.data[name]