fun() 错误，未定义

def sum_2(a,b):# 形式参数
print(a)
print(b)
return a + b

result = sum_2(2,6) # 实际参数

a = len('get')

print(a)

print(result)

def power(x,n=2): # n默认参数，缺省参数
return x**n
a = power(4,3)
b = power(5,3)
c = power(6)
print(c)
print(b)
print(a)
a = int('16',8)
print(a)

def infos(name,age=24,gender='女'):
return '大家好，我叫%s，我今年%d岁，我是一名%s生'%(name,age,gender)
s = infos('mia',24,'女')
lily = infos('lily')
jack = infos('jack',gender='男')
print(jack)
print(lily)
print(s)

可变参数

def total(*args): # 可变参数
print(args)
result = 0
for i in args:
result += i**2
return result
result = total(1,2,3,4,56,7,3)

result = [1,2,3,4]

result = total(*a)

print(result)

def f(**kwargs): # 可变参数接收字典
for k,v in kwargs.items():
print(k,v)
d = {'name':'xiaoming','age':18}
f(**d)