Answer to Question #297651 in Python for Chinna

Question

Develop a custom class called Contact(Name, Dob, Phonenumber) which has methods such as Read() and Display() with the following criterions. Read Name (Text: maximum length 50), Dob(Date: after 01/01/2000) and

Phone numbers(Integer) from user and some of these accepting only a specific format with the four-digit area and six-digit local codes accepted as ten digits, or separated into blocks using hyphens or spaces, and with the area code optionally enclosed in parentheses.

For example, all of these are valid: 0426-123-456, [phone] and 0432

123456.

Read the phone numbers from console and for each one echo the number in the form "[phone]" or report an error for any that are invalid, or that don't have exactly ten digits.

Show how the object creations and manipulations are done for 'N' valid

Contacts.

Finally store the contacts in a separate .csv file

Answer 1

import csv

class Contact:
    def __init__(self, name, dob, phoneNumber):
        self.name = name
        self.dob = dob
        self.phoneNumber = phoneNumber

    def read(self):
        num = self.phoneNumber
        if num.isdigit() and len(num) == 10:
            return f'({phoneNumber[4:7]}) {phoneNumber[7:10]} {phoneNumber[0:4]}'
        elif '-' in num:
            number = num.split('-')
            count = ''
            for c in (number):
                count += str(len(c))
            if count == '433':
                return f'({number[1]}) {number[2]} {number[0]}'
        elif '(' in num and ')' in number:
            number = num.split(' ')
            count = ''
            for c in (number):
                count += str(len(c))
            if count == '46':
                return  f'({number[1][0:3]}) {number[1][3:6]} {number[0]}'
        else:
            return 'Invalid phone number '

    def display(self):
        return f"{self.name} {self.dob} {self.phoneNumber}"

n = 2;

contacts = []

for i in range(n):
    print('Enter name: ')
    name = input()
    print('Enter Date of Birth')
    dob = input()
    print('Enter phone number')
    phoneNumber = input()

    contact = Contact(name, dob, phoneNumber)
    contacts.append(contact)

    print(contact.read())

with open('contacts.csv', mode='w') as csv_file:
    fieldnames = ['name', 'dob', 'phoneNumber']
    writer = csv.DictWriter(csv_file, fieldnames=fieldnames)
    writer.writeheader()
    for contact in contacts:
        writer.writerow({'name': contact.name, 'dob': contact.dob, 'phoneNumber': contact.phoneNumber})