學習python發現可變關鍵字中有*args以及**kw兩種。自己試驗後理解如下:
def ss(a,b,*args,**kw):
print('fist position:',a)
print('second position:',b)
print('third position:',args)
print('fourth position:',kw)
ss(12,33,city='shanghai')
fist position: 12
second position: 33
third position: ()
fourth position: {'city': 'shanghai'}
ss(12,33,'shanghai')
fist position: 12
second position: 33
third position: ('shanghai',)
fourth position: {}
所以我理解二者的區別之一是kw需要在函數中用賦值=來定義,但是args不需要。。