Python Attributes

example.py

import module

class Chinese(object):
    
    # Class attributes
    nationality = "China"

    # Instance attributes
    def __init__(self, name, birth_year):

        self.name = name
        self.birth_year = birth_year

    def get_name(self):
        
        return self.name

    def get_age(self, year):

        return year - self.birth_year

    @staticmethod
    def get_province(cls, city):
        if city == "Qingdao":
            return "Shandong"
        else:
            return "Other than Shandong"

    
def get_fake_name():

    return "Jingze Wang"

fake_nationality = "American"

attr_0 = "nationality"
attr_1 = "name"
attr_2 = "get_name"
attr_3 = "get_province"


print("Checking Class attributes ...")
print("Has attribute {}: ".format(attr_0))
print(hasattr(Chinese, attr_0))
print("Has attribute {}: ".format(attr_1))
print(hasattr(Chinese, attr_1))
print("Has attribute {}: ".format(attr_2))
print(hasattr(Chinese, attr_2))
print("Has attribute {}: ".format(attr_3))
print(hasattr(Chinese, attr_3))
print("Getting nationality: ")
print(getattr(Chinese, attr_0))
print("Getting fake nationality: ")
# Overwrites attributes
setattr(Chinese, attr_0, fake_nationality)
print(getattr(Chinese, attr_0))
print("-"*50)


person_0 = Chinese(name="Xiaolong Li", birth_year=1990)
print("Checking Instance attributes ...")
print("Has attribute {}: ".format(attr_0))
print(hasattr(person_0, attr_0))
print("Has attribute {}: ".format(attr_1))
print(hasattr(person_0, attr_1))
print("Has attribute {}: ".format(attr_2))
print(hasattr(person_0, attr_2))
print("Has attribute {}: ".format(attr_3))
print(hasattr(person_0, attr_3))
print("Getting Instance attributes ...")
print("Getting name: ")
print(person_0.get_name())
print("Getting fake name {}: ".format(attr_1))
# Overwrites attributes
setattr(person_0, attr_2, get_fake_name)
print(person_0.get_name())
print("Getting nationality: ")
print(getattr(person_0, attr_0))
print("-"*50)

attr_4 = "get_fake_name"
attr_5 = "get_fake_age"
attr_6 = "get_age"
print("Checking Module attributes ...")
print("Has attribute {}: ".format(attr_4))
print(hasattr(module, attr_4))
print("Has attribute {}: ".format(attr_5))
print(hasattr(module, attr_5))
print("Getting age: ")
print(person_0.get_age(2019))
print("Getting fake age: ")
# Overwrites attributes
setattr(person_0, attr_6, module.get_fake_age)
print(person_0.get_age(2019))

module.py

def get_fake_age(*args, **kwargs):

    return 18