A simple python program to adopt a pet and the details will be entered in a file.

adoption_pet.py

'''
A Python program to adopt a pet and appending the details in a file.
The entry can also be viewed by reading the file
'''

import datetime


# Defining main function
def get_pet(pet):
    # If user input 1 then this condition executes
    if pet == 1:
        adopt = int(input("Press 1 for Pet Dog 2 for Pet Cat: \n"))

        if adopt == 1:
            with open("Pet-Dog.txt", "a") as f:
                f.write(str(datetime.datetime.now()) + ": " + f"{name_inp} just adopted a Dog. \n")
            print("Successfully Entered.")

        elif adopt == 2:
            with open("Pet-Cat.txt", "a") as f:
                f.write(str(datetime.datetime.now()) + ": " + f"{name_inp} just adopted a Cat. \n")
            print("Successfully Entered.")

        else:
            print("We have only CATS and DOGS.")

    # If usr input 2 then this condition executes
    elif pet == 2:
        info = int(input("Enter 1 for Pet Dog Details 2 for Pet Cat Details: \n"))
        if info == 1:
            with open("Pet-Dog.txt") as f:
                for content in f:
                    print(content, end='')

        elif info == 2:
            with open("Pet-Cat.txt") as f:
                for content in f:
                    print(content, end='')

        else:
            print("Enter Valid Option!!")

    else:
        print("Choose 1 for adoption and 2 for Information...")


if __name__ == '__main__':
    print("------------ Welcome to Pet Adoption Center -----------")

    # Username Input
    name_inp = input("Enter your name: \n")

    # Taking Input from users
    user_input = int(input("Press 1 for Adoption 2 for Information: \n"))

    # Conditions according to user input
    if user_input == 1:
        get_pet(user_input)
    else:
        get_pet(user_input)