Functions

# define a function
def my_function():
    print("Hello in my function")


my_function()  # function call


# define a function with parameters
def say_hello(name, name2):  # 'name' is a parameters
    print("Hello " + name + " and " + name2)


say_hello("Ola", "Artur")  # 'Ola' and 'Artur' are arguments


# define a function with parameters and keywords!
def say_hi(name3, name2, name1):  # 'name1', 'name2' and 'name3' are keywords
    print("Hello " + name1 + ", " + name2 + " and " + name3)
    print("I like the first person so much " + name1)


say_hi(name2="Ania", name1="Hania", name3="Kasia")


# define a function with type hint
def person_(name: str, age: int):  # ': str' and ': int' are type hints
    print("Name: " + name)
    print("Age: " + str(age))


person_("Ola", 18)


def greet_people(people: list) -> list:  # '-> list[str]' you can find sth like that too
    return [f"Hello {person}! How are you doing today?" for person in people]


result = greet_people(["James", "Matthew", "Claire"])

for item in result:
    print(item)


# function aliasing
def fruits(fruit: str):
    print(f"I like {fruit}")


food = fruits  # the same function, but with another name

print("ID of food " + str(id(food)))
print(f"ID of fruits {id(fruits)}")

fruits("apple")
food("apple")