# samples/typing.examples.py


###############################################
# This module is not supposed to be executed! #
###############################################


# not strongly typed language
a = 7
b = "7"

a + b == 14
concatenate(a, b) == "77"


# dynamic typing
a = 7
a * 2 == 14
a = "Hello"
a * 2 == "HelloHello"


# other languages
String greeting = "Hello";
int m = 7;
float pi = 3.141592;


# function annotations
def greet(first_name, last_name, age):
    return f"Greeting {first_name} {last_name} of age {age}"

def greet(
    first_name: "First name of the person we are greeting",
    last_name: "Last name of the person we are greeting",
    age: "The person's age"
) -> "Returns the greeting sentence":
    return f"Greeting {first_name} {last_name} of age {age}"

def greet(first_name: str, last_name: str, age: int = 18) -> str:
    return f"Greeting {first_name} {last_name} of age {age}"


# list
from typing import List

def process_words(words: List[str]):
    for word in words:
        # do something with word


# dict
from typing import Dict

def process_users(users: Dict[str, int]):
    for name, age in users.items():
        # do something with name and age


# optional
from typing import Optional

def greet_again(name: Optional[str] = None):
    if name is not None:
        print(f"Hello {name}!")
    else:
        print("Hey dude")


# custom
class Cat:
    def __init__(self, name: str):
        self.name = name

def call_cat(cat: Cat):
    return f"{cat.name}! Come here!"