我的程序显示意外的令牌错误。为什么？

Question

如果n以外的因子总和为n，程序需要返回true。我需要在运行时使用函数名称。当我输入

factors(45) 

它显示有一个未解决的标记错误。请检查程序有什么问题。

def factors(n):#unexpected token error 
factorlist = [] 
for i in range(1,n): 
    if n%i == 0: 
    factorlist = factorlist + [i] 
return(factorlist) 
def perfect(n): 
if sum(factorlist) == n: 
    return(True) 
else : 
    return(False) 

Answer 1

你不叫factors(n)到perfect(n)功能。所以，你必须使用 factorlist = factors(n)进入perfect(n)函数。

，然后尝试这样：

def factors(n): 
    factorlist = [] 
    for i in range(1, n): 
    if n % i == 0: 
     factorlist = factorlist + [i] 
    return (factorlist) 


def perfect(n): 
    factorlist = factors(n) # use this line 
    if sum(factorlist) == n: 
    return (True) 
    else: 
    return (False) 

print(perfect(45)) # Ouput : False 

Answer 2

尝试：

def factors(n): 
    factorlist = [] 
    for i in range(1,n): 
     if n%i == 0: 
      factorlist = factorlist + [i] 
    print factorlist 
    return factorlist 

def perfect(n): 
    factorlist = factors(n) 
    if sum(factorlist) == n: 
     return True 
    else : 
     return False 

n = int(raw_input('Enter the number: ')) 
print(perfect(n)) 

输出：