Cakupan dan fungsi buatan pengguna

Pengantar Fungsi di Python

Hugo Bowne-Anderson

Instructor

Kilasan singkat: scope dalam fungsi

Tidak semua objek dapat diakses di seluruh skrip
Scope (cakupan) - bagian program tempat suatu objek/nama dapat diakses
- Global scope - didefinisikan di badan utama skrip
- Local scope - didefinisikan di dalam fungsi
- Built-in scope - nama pada modul built-ins bawaan

Cakupan global vs. lokal (1)

def square(value):
    """Returns the square of a number."""
    new_val = value ** 2
    return new_val

square(3)

new_val

<hr />----------------------------------------------------------------
NameError                       Traceback (most recent call last)
<ipython-input-3-3cc6c6de5c5c> in <module>()
<hr />-> 1 new_value
NameError: name 'new_val' is not defined

Cakupan global vs. lokal (2)

new_val = 10

def square(value):
    """Returns the square of a number."""
    new_val = value ** 2
    return new_val

square(3)

new_val

Cakupan global vs. lokal (3)

new_val = 10

def square(value):
    """Returns the square of a number."""
    new_value2 = new_val ** 2
    return new_value2

square(3)

new_val = 20

square(new_val)

Cakupan global vs. lokal (4)

new_val = 10

def square(value):
    """Returns the square of a number."""
    global new_val
    new_val = new_val ** 2
    return new_val

square(3)

new_val

Ayo berlatih!

Pengantar Fungsi di Python