JackInTaiwan

static PyObject *indexerr = NULL;

PyObject *
PyList_GetItem(PyObject *op, Py_ssize_t i)
{
    if (!PyList_Check(op)) {
        PyErr_BadInternalCall();
        return NULL;
    }
    if (!valid_index(i, Py_SIZE(op))) {

JackInTaiwan

prices = [
    ("ice cream", 80),
    ("bike", 20000),
    ("water", 30),
]


sorted_by_price = sorted(prices, key=lambda x: x[1])
print(sorted_by_price)
# > [('water', 30), ('ice cream', 80), ('bike', 20000)]

JackInTaiwan

### Use recursive lambda functions to define function with multiple arguments
add = lambda x: (lambda y: x + y)
print(add(3)(5))
# > 8


### Use normal function to do the same thing
def add(x, y):
    return x + y
print(add(3, 5))

JackInTaiwan

### Build lambda function
lambda x: x + 1


### Build lambda function and assign it into one variable
add = lambda x: x + 1
print(add(5))
# > 6

JackInTaiwan

def dog():
    height = 40
    
    def grow_up():
        nonlocal height
        height = height + 1
        
        def show_height():
            print("Thanks for making me growing up. I'm now {} meters !!!!".format(height))

JackInTaiwan

def dog():
    height = 40
    
    def grow_up():
        nonlocal height
        height = height + 1
        print("Thanks for making me growing up. I'm now {} meters !!!!".format(height))

    return grow_up

JackInTaiwan

global x
x = 10

def add_x():
    x = x + 1



if __name__ == "__main__":
    add_x()

JackInTaiwan

def dog():
    height = 40
    
    def grow_up():
        height = height + 1

    return grow_up


if __name__ == "__main__":

JackInTaiwan

def dog():
    height = 40
    
    def profile():
        print("I'm a dog and my height is {}.".format(height))
        
    return profile

JackInTaiwan

class Dog:
    def __init__(self, func):
        self.talent = func

    def bark(self):
        print("Bark !!!")


@Dog
def dog_can_pee():