■ 闭包特性

■ 简单闭包

def outer(logo):def inner(msg):print(f"<{logo}>{msg}<{logo}>")return innerfn1 = outer("程序员")
fn1("大家好")
fn1("大家好")

■ 使用nonlocal关键字修改外部函数的值

fn2 = outer("大学教育")
fn2("大家好")
# 使用nonlocal关键字修改外部函数的值
def outer(num1):def inner(num2):nonlocal num1num1 += num2print(num1)return innerfn = outer(10)
fn(10)
fn(10)
fn(10)
fn(10)

■ 使用闭包实现ATM小案例

def account_create(initial_amount=0):def atm(num, deposit=True):nonlocal initial_amountif deposit:initial_amount += numprint(f"存款：+{num}， 账户余额：{initial_amount}")else:initial_amount -= numprint(f"取款：-{num}， 账户余额：{initial_amount}")return atmatm = account_create()atm(100)
atm(200)
atm(100, deposit=False)