Function, kwargs

# num: int = 10

def add_num(a: int, b: int) -> int:
    """add two int

    :param a: first param
    :param b: second param
    :return: sum value
    """
    return a + b


print(help(add_num))

r = add_num(1, 2)
print(r)

s = add_num('X', 'Y')
print(s)  # XY working!!!


####################################################################
def menu(x, y, z='Z'):
    print(x, y, z)


menu(x='a', y='b')


####################################################################
# list 나 dictionary 를 default 값으로 지정하지 말자
def buggy_func(x, l=[]):
    l.append(x)
    return l


r = buggy_func(100)
print(r)  # [100]

r = buggy_func(100)
print(r)  # [100, 100]


def fixed_func(x, l=None):
    if l is None:
        l = []
    l.append(x)
    return l


r = fixed_func(100)
print(r)  # [100]

r = fixed_func(100)
print(r)  # [100]


####################################################################
# 위치 인수의 튜플화

def say_something(word, *args):
    print(word)  # Hi
    print(args)  # ('Mike', 'Nancy')

    for arg in args:
        print(arg)  # Mike Nancy


say_something('Hi', 'Mike', 'Nancy')

# 아래 처럼 호출도 가능
t = ('Mike', 'Nancy')
say_something('Hi', *t)


####################################################################
# 키워드 인수의 사전화

def menu(**kwargs):
    print(kwargs)  # {'x': 1, 'y': 2}
    for k, v in kwargs.items():
        print(k, v)


menu(x=1, y=2)

# 아래 처럼 호출도 가능
d = {'x': 1, 'y': 2}
menu(**d)


def complex_menu(food, *args, **kwargs):
    print(food)
    print(args)
    print(kwargs)


complex_menu('banana', 'apple', 'orange', drink='coffee')
'''
banana
('apple', 'orange')
{'drink': 'coffee'}
'''


####################################################################
# 함수내 함수

def outer(a, b):
    def plus(c, d):
        return c + d

    r = plus(a, b)
    print(r)


outer(1, 2)