>>> myDict={"color":["red","green","blue"],"shape":["circle","square","triangle"],"pattern":["dot","line"]}

>>> myDict["shape"][0]

运行结果：

__？___

>>> len(mydict)

运行结果：  {1}  

>>> mydict["鸡块"] = mydict.get("鸡块",12)

>>> mydict.get("鸡块","抱歉，无此商品！")

运行结果：  {2}  

myDict={'a':97,'b':98,'c':99}

for k,v in myDict.items():

   print(k+':'+str(v),end=' ')

运行结果：  {1}  

def Sum(a, b=3, c=5):

   return sum([a, b, c])

print(Sum(a=8,c=2))

print(Sum(8))

print(Sum(8,2))

运行结果：

_____

_____

_____

def demo(a, b, c=3, d=100):

   return sum((a,b,c,d))

print(demo(1, 2, d=3))

def demo():

   x = 5

x = 3

demo()

print(x)

def Sum(*p):

   return sum(p)

print(Sum(8, 2, 10))