Why the following code returns "none" in print statement?

Question

I run the following code:

class mobile:
    def __init__(self, name, brand):
        self.name = name
        self.brand = brand
    def get_name(self):
        return self.name
class cpu(mobile):
    def get_name(self):
        print("This mobile has HighTech %s CPU " % self.name)    
brand = cpu("Intel","Sony")
print(brand.get_name())

The result is:

This mobile has HighTech Intel CPU
None

Why does it return 'None' in second line?

Answer 1

The print statement when calling the get_name function is redunant, try:

class mobile:
    def __init__(self, name, brand):
        self.name = name
        self.brand = brand
    def get_name(self):
        return self.name
class cpu(mobile):
    def get_name(self):
        print("This mobile has HighTech %s CPU " % self.name)    
brand = cpu("Intel","Sony")
brand.get_name()

Inside get_name() you already state a print statement, therefore no second print outside the function is necessary.