Write a function that prints My name is <first name> <last name>Prototype: def say_my_name(first_name, last_name=""):first_name and last_name must be strings otherwise, raise a TypeError exception with the message first_name must be a string or last_name must be a stringYou are not allowed to import any module

To write the requested function, follow these steps:

1. Define the function say_my_name with two parameters: first_name and last_name. The last_name parameter is optional and has a default value of an empty string.

2. Inside the function, check if both first_name and last_name are strings. If either of them is not a string, raise a TypeError exception with the message "first_name must be a string or last_name must be a string".

3. If both first_name and last_name are strings, print the message "My name is <first name> <last name>". You can use string concatenation or f-strings to format the message.

Here's the code for the function:

def say_my_name(first_name, last_name=""):
    if not isinstance(first_name, str) or not isinstance(last_name, str):
        raise TypeError("first_name must be a string or last_name must be a string")
    else:
        print(f"My name is {first_name} {last_name}")

Note that this code does not require importing any modules.