作用域

Python 函数编写

Shayne Miel

Software Architect @ Duo Security

名称

名称

作用域

作用域

作用域

x = 7
y = 200
print(x)

7

def foo():
    x = 42
    print(x)
    print(y)

foo()

42
200

print(x)

7

作用域

作用域

作用域

作用域

作用域

global 关键字

x = 7

def foo():
  x = 42
  print(x)

foo()

42

print(x)

7

x = 7

def foo():
  global x
  x = 42
  print(x)

foo()

42

print(x)

42

nonlocal 关键字

def foo():
  x = 10

  def bar():
    x = 200
    print(x)

  bar()
  print(x)

foo()

200
10

def foo():
  x = 10

  def bar():
    nonlocal x
    x = 200
    print(x)

  bar()
  print(x)

foo()

200
200

Passons à la pratique !

Python 函数编写