的Python：函數參數和返回值

Question

說我有一個功能

def equals_to(x,y): 
a + b = c 
def some_function(something): 
for i in something: 
... 

有沒有辦法使用，是由equals_to計算爲參數some_function這樣

equals_to(1,2) 
some_function(c) 

Answer 1

您需要c方式到return從函數c的值。

def equals_to(x,y): 
    c = x + y   # c = x + y not a + b = c 
    return c   # return the value of c 

def some_function(something): 
    for i in something: 
    ... 
    return 

sum = equals_to(1,2)  # set sum to the return value from the function 
some_function(sum)  # pass sum to some_function 

同樣的equals_to的函數簽名採用的參數x,y但在功能使用a,b和你的任務是南轅北轍，c需要的x + y值不等於a + bc。

強烈推薦：http://docs.python.org/2/tutorial/