Python函数中4种参数的使用教程

def f(name,age):
  
    print('I am %s,I am %d'%(name,age))
  
f('alex',18)
f('alvin',16)

def f(name,age):
  
    print('I am %s,I am %d'%(name,age))
  
# f(16,'alvin') #报错
f(age=16,name='alvin')

def print_info(name, age, sex='male'):
    print('Name:%s' % name)
    print('age:%s' % age)
    print('Sex:%s' % sex)
    return

print_info('alex', 18)
print_info('小明', 40, 'female')

# def add(x,y):
#     return x+y
  
def add(*tuples):
    sum=0
    for v in tuples:
        sum+=v
  
    return sum
  
print(add(1,4,6,9))
print(add(1,4,6,9,5))

def print_info(**kwargs):
    print(kwargs)
    for i in kwargs:
        print('%s:%s' % (i, kwargs[i]))  # 根据参数可以打印任意相关信息了

    return

print_info(name='小明', age=18, sex='female', hobby='girl', nationality='Chinese', ability='Python')


###########################位置

def print_info(name, *args, **kwargs):  # def print_info(name,**kwargs,*args):报错

    print('Name:%s' % name)

    print('args:', args)
    print('kwargs:', kwargs)

    return

print_info('小明', 18, hobby='girl', nationality='Chinese', ability='Python')
# print_info(hobby='girl','小明',18,nationality='Chinese',ability='Python')  #报错
# print_info('小明',hobby='girl',18,nationality='Chinese',ability='Python')   #报错

def f(*args):
    print(args)

f(*[1, 2, 5])

def f(**kargs):
    print(kargs)

f(**{'name': '小明'})

def add(x,y,f):
    return f(x) + f(y)
  
res = add(3,-6,abs)
print(res)
###############
def foo():
    x=3
    def bar():
        return x
    return bar