Question

代码运行时会输出，但不是必需的，它会在所有百分比上返回空白

def income():
    num= raw_input("Enter your Income: ")
    print "Your income is: %d " % int(num)
    return num
income= income()

def bills_expenses():
    bills_kitty=0
    bills_kitty=(income*(55/100))
    return  ("Your bills kitty should have: ", bills_kitty)

def long_term_savings():
    long_term_savings_kitty=(10/100)*income
    return "Your long term kitty should have: ",  long_term_savings_kitty

def play_and_leisure():
    play_and_leisure_kitty=(10/100)*income
    return "Your play and leisure kitty should have: " , play_and_leisure_kitty


def education_personal_growth():
    education_personal_growth_kitty=(10/100)*income
    return "Your personal growth  kitty should have: ", education_personal_growth_kitty


def pay_myself_Financial_fredom():
    pay_myself_Financial_fredom_kitty=(10/100)*income
    return "Your pay yourself kitty should have: ", pay_myself_Financial_fredom_kitty

def give_back_to_the_community():
    give_back_to_the_community_kitty=(5/100)*income
    return "Your giving back kitty should have: " , give_back_to_the_community_kitty



bills=bills_expenses()
long_term = long_term_savings()
play=play_and_leisure()
education=education_personal_growth()
mine=pay_myself_Financial_fredom()
give=give_back_to_the_community()


print bills
print long_term
print play
print education
print mine
print give

预期结果是每个方法在调用时都应输出百分比。但这就是所得到的。

Enter your Income: 200
Your income is: 200
('Your bills kitty should have: ', '')
('Your long term kitty should have: ', '')
('Your play and leisure kitty should have: ', '')
('Your personal growth  kitty should have: ', '')
('Your pay yourself kitty should have: ', '')
('Your giving back kitty should have: ', '')

我想念什么？

Answer 1

代码非常清楚：income返回一个字符串。您在字符串上的“算术”将返回一个空字符串。返回之前将其转换为int。另外，不要重载变量income：

def get_income():
    num = int(raw_input("Enter your Income: "))
    print "Your income is: %d " % num
    return num

income = get_income()

Answer 2

您面临的问题是双重的。

使用raw_input的输入类型为字符串，不会出现错误，因为

print "tata" * 2     # tatatata

是有效的字符串表示法-您一直都乘以0，所以得到空字符串：''。

第二，您需要调整除法以返回浮点数。

固定代码：

def get_income(): # See Prunes post
    num = float(raw_input("Enter your Income: "))
    print "Your income is: %d " % int(num)
    return num

income= get_income()

print(type(income))

def bills_expenses():
    bills_kitty=0
    bills_kitty=(income*(55/100.0))
    return  ("Your bills kitty should have: ", bills_kitty)

def long_term_savings():
    long_term_savings_kitty=(10/100.0)*income
    return "Your long term kitty should have: ",  long_term_savings_kitty

def play_and_leisure():
    play_and_leisure_kitty=(10/100.0)*income
    return "Your play and leisure kitty should have: " , play_and_leisure_kitty

def education_personal_growth():
    education_personal_growth_kitty=(10/100.0)*income
    return "Your personal growth  kitty should have: ", education_personal_growth_kitty

def pay_myself_Financial_fredom():
    pay_myself_Financial_fredom_kitty=(10/100.0)*income
    return "Your pay yourself kitty should have: ", pay_myself_Financial_fredom_kitty

def give_back_to_the_community():
    give_back_to_the_community_kitty=(5/100.0)*income
    return "Your giving back kitty should have: " , give_back_to_the_community_kitty

bills=bills_expenses()
long_term = long_term_savings()
play=play_and_leisure()
education=education_personal_growth()
mine=pay_myself_Financial_fredom()
give=give_back_to_the_community()


print bills
print long_term
print play
print education
print mine
print give

输出：

Enter your Income: Your income is: 200 
<type 'float'>
('Your bills kitty should have: ', 110.00000000000001)
('Your long term kitty should have: ', 20.0)
('Your play and leisure kitty should have: ', 20.0)
('Your personal growth  kitty should have: ', 20.0)
('Your pay yourself kitty should have: ', 20.0)
('Your giving back kitty should have: ', 10.0)

您将获得浮点数错误-请参见Is floating point math broken?-您可以使用round(3.2222,2)舍入到两位小数。

Answer 3

raw_input在这里返回一个字符串，而不是整数，因此您必须将income变量转换为int格式，并在无法转换时进行错误处理。

由于收入是一个字符串，所以。此处的细微错误在于乘法。在python2中，整数除法返回舍入的整数。这意味着55/100将返回0，而不是0.55。您需要进行浮点除法，因此55.0 // 100将为您提供.55。

本质上，您要将收入输入（字符串）乘以0。在python中，字符串乘以值x会使字符串重复x次。因此，您在此处得到一个空白字符串。

Answer 4

只需将收入返回为整数

return int(num)

如何修复“ Python返回方法不返回串联字符串中的整数

4 个答案: