函数复习(放个假差点忘了......)

所有截图来自<python编程:从入门到实践>

def make_shirt(size,pattern):

    print('My T-shirt size is '+size+'.\n'+'Print '+pattern.title()+' on it.')

make_shirt('M','i love python')

def make_shirt(size,pattern='i love python'):
    print('My T-shirt size is '+size+'.\n'+'Print '+pattern.title()+' on it.')
make_shirt('XXL')

make_shirt('M')

make_shirt('Whatever',pattern='i love nothing but python')

def describe_city(city_name,country='China'):
    print(city_name.title()+' is belong to '+country)
describe_city('tianjin')
describe_city(city_name='beijing')
describe_city('londom','UK')