Python中的语法错误试图计算复杂的兴趣

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这里我有以下例子来计算复杂的兴趣和抵押利息。然而，它给了我TotalMonthsMortgage = TotalMonthsMortgage - 1.0标记第一个TotalMonthsMortgage /左边一个的语法错误，如果我引用它，它将标记下一行AlreadyPaidAmount = AlreadyPaidAmount + TotalAmountMortgage/TotalMonthsMortgage标记左侧的AlreadyPaidAmount。我自己找不到错误，我做错了什么？Python中的语法错误试图计算复杂的兴趣

## Complicated interest is the bank interest for example charged for mortgage loans 

TotalAmountMortgage = float(raw_input('Enter the total amount of the mortgage to be taken:')) ##this is Principal 
TotalYearsMortgage = float(raw_input('Enter the number of total years of the mortgage to be taken:')) 
TotalMonthsMortgage = float(TotalYearsMortgage*12.0) 
TotalYearsFixedInterest = float(raw_input('Enter the number of years with fixed interest mortgage to be taken:')) 
TotalMonthsFixedInterest = 12.0*TotalYearsFixedInterest 
FixedInterest = float(raw_input('Enter fixed interest for the mortgage to be taken:')) 
FloatingInterest = float(raw_input('Enter floating interest for the mortgage to be taken:')) 
PoolInterestPaid = 0.0 
MonthlyPayment = 0.0 
AlreadyPaidAmount = 0.0 
FixedPayment = float(TotalAmountMortgage/TotalMonthsMortgage) 
TotalPayment = float 
while (TotalMonthsMortgage-TotalMonthsFixedInterest)>0: 
    MonthlyPayment = FixedPayment+(TotalAmountMortgage-((FixedPayment*TotalMonthsFixedInterest+AlreadyPaidAmount))*FloatingInterest/1200 
    TotalMonthsMortgage = TotalMonthsMortgage - 1.0 
    AlreadyPaidAmount = AlreadyPaidAmount+TotalAmountMortgage/TotalMonthsMortgage 
TotalPayment = (TotalAmountMortgage*FixedInterest*TotalMonthsFixedInterest)/TotalMonthsMortgage+(TotalAmountMortgage*TotalMonthsFixedInterest)/TotalMonthsMortgage+PoolInterestPaid 
print TotalPayment            ##This is the total amount to be paid 
print (TotalPayment - TotalAmountMortgage)      ##This is the amount of intererst to be paid over time 
print (TotalPayment - TotalAmountMortgage)/TotalMonthsMortgage ##This is the amount of monthly payment

来源

2013-04-13 Pythonfella

你有太多的括号前行，你可能想要一个在太底：

MonthlyPayment = FixedPayment + (
    TotalAmountMortgage - (
     (FixedPayment * TotalMonthsFixedInterest + AlreadyPaidAmount) 
    ) * FloatingInterest/1200) 
     ----------------------^

我必须打破跨多个线的线条来说明这个问题，你可能希望至少要保持代码的可读性。

因为Python 允许您使用括号时打破跨多个系中的表达，Python不能检测时忘记闭括号直到下一行代码。这同样适用于方括号（[]）和花括号（{}）。

因此，我们的经验法则是在之前查看行，当遇到语法错误时。

来源

2013-04-13 17:23:47

感谢Martijn Pieters，解决了这个难题。 – Pythonfella

你缺少在这一行的括号：

MonthlyPayment = FixedPayment+(TotalAmountMortgage-((FixedPayment*TotalMonthsFixedInterest+AlreadyPaidAmount))*FloatingInterest/1200

放在最后一个右括号，你应该是好去。

来源

2013-04-13 17:24:10 ecline6

感谢ecline6，解决了这个难题。 – Pythonfella

Python中的语法错误试图计算复杂的兴趣

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