def 函数

定义

def add(a, b):
  return  a + b

调用

def add(a, b):
  return a + b
add(1, 10)

默认参数

def add(a, b = 1):
  return a + b
add(10)

关键子参数

def add(a, b):
  return a + b
add(b = 10, a = 1)

不定参数

def add(*args):
  total = 0
  for i in args:
    total += i
  return total
add(1, 2, 3, 4)

多返回值

def check(d):
  return d > 0, d == 0, d < 0


gt, eq, lt = check(10)


print(gt, eq, lt)

拆包/解构

# 元组
one, two = (1, 2)
# -> 1, 2


# 数组
one, two = [1, 2]
# -> 1, 2


# 字典
m = { 'name': 'c', 'age': 12 }
name, age = m
#  -> 'name', 'age'


name, age = m.keys()
# -> 'name', 'age'


name, age = m.values()
# -> 'c', 12