有没有办法找出语法错误？

Question

我写了一个所得税计算器的代码，该代码根据一个人的性别计算一个人的所得税。执行时，它将引发错误。我不知道为什么它显示错误。我是初学者，因此请忽略代码中是否存在任何愚蠢的错误

以下是错误的附件图片

 def incometax_calc():

    income = int(input("Enter your total annual income in lakhs: "))
    gender = str(input("Enter m if Male, f if Female: "))


    if gender == m:
        if 1<(income)<(2.5):
            tax = 0
            tax_ded = ((tax/100)*income)
            final_amt = (income)-(tax_ded)
            print("Your annual income: ",income)
            print("Tax percentage applied: ",tax)
            print("Tax deducted: ",tax_ded)
            print("Final amount: ",final_amt)

    if 2.5<=(income)<5:
        tax = 10
        tax_ded = ((tax/100)*income)
        final_amt = (income)-(tax_ded)
        print("Your annual income: ",income)
        print("Tax percentage applied: ",tax)
        print("Tax deducted: ",tax_ded)
        print("Final amount: ",final_amt)

    if 5<=(income)<10:
        tax = 20
        tax_ded = ((tax/100)*income)
        final_amt = (income)-(tax_ded)
        print("Your annual income: ",income)
        print("Tax percentage applied: ",tax)
        print("Tax deducted: ",tax_ded)
        print("Final amount: ",final_amt)

    if (income)>10:
        tax = 30
        tax_ded = ((tax/100)*income)
        final_amt = (income)-(tax_ded)
        print("Your annual income: ",income)
        print("Tax percentage applied: ",tax)
        print("Tax deducted: ",tax_ded)
        print("Final amount: ",final_amt)     

elif gender == f:
    if 1<(income)<(2.5):
        tax = 0
        tax_ded = ((tax/100)*income)
        final_amt = (income)-(tax_ded)
        print("Your annual income: ",income)
        print("Tax percentage applied: ",tax)
        print("Tax deducted: ",tax_ded)
        print("Final amount: ",final_amt)

    if 2.5<=(income)<5:
        tax = 5
        tax_ded = ((tax/100)*income)
        final_amt = (income)-(tax_ded)
        print("Your annual income: ",income)
        print("Tax percentage applied: ",tax)
        print("Tax deducted: ",tax_ded)
        print("Final amount: ",final_amt)

    if 5<=(income)<10:
        tax = 10
        tax_ded = ((tax/100)*income)
        final_amt = (income)-(tax_ded)
        print("Your annual income: ",income)
        print("Tax percentage applied: ",tax)
        print("Tax deducted: ",tax_ded)
        print("Final amount: ",final_amt)

    if (income)>10:
        tax = 20
        tax_ded = ((tax/100)*income)
        final_amt = (income)-(tax_ded)
        print("Your annual income: ",income)
        print("Tax percentage applied: ",tax)
        print("Tax deducted: ",tax_ded)
        print("Final amount: ",final_amt)
else:
    print("Wrong input!!")

print(incometax_calc())

Answer 1

您的字符串比较错误。应该是

gender == 'm'

否则，解释器认为它是变量而不是字符串。

Answer 2

if gender == m:

在这里，您正在与名为m的变量进行比较，而不是字符串'm'。

要解决此问题，请将该变量变成字符串，如下所示：

if gender == 'm':

Answer 3

Python认为m是一个变量名。用引号将变量gender与值'm'进行比较。

if gender == 'm':
    ...

Answer 4

错误在这里：

if gender == m:

如果您以此方式编写，他会查看m是否为变量，但是您希望"m"为字符串。

Answer 5

从堆栈跟踪中：

  

第8行：未定义名称“ m”

语句if gender == m引发错误，因为程序正在寻找未定义的变量m。如果要比较变量性别和字符串值m，则应将其括在双引号或单引号中。

Answer 6

这是一个简单的定义错误。

df<-data.frame()
sample <- c(8.93,9.11,9.12,9.05,8.87,8.95,9.02)
combn(sample,2) -> com1
for (i in 1:ncol(com1)){
    com1[,i]
    setdiff(sample,com1[,i]) -> com2
    combn(com2,2) -> com3
    for (j in 1:ncol(com3)){
    setdiff(com2,com3[,j]) -> com4
    c(com1[,i],com3[,j],com4) -> de
    df <- rbind(df,de)
    }
}
df

变量if gender == m: 在使用前尚未在代码中定义。

尝试类似的东西：

m

OR

m = "m"
if gender == m

如果m是您在此方法中引用的global变量，请指定

if gender == 'm'

在global m 首次使用之前。

Answer 7

m未定义。 在这里，您将m作为python对象调用。 您正在寻找的是"m"

您的代码将如下所示。

 def incometax_calc():

    income = int(input("Enter your total annual income in lakhs: "))
    gender = str(input("Enter m if Male, f if Female: "))


    if gender == "m":
        if 1<(income)<(2.5):
            tax = 0
            tax_ded = ((tax/100)*income)
            final_amt = (income)-(tax_ded)
            print("Your annual income: ",income)
            print("Tax percentage applied: ",tax)
            print("Tax deducted: ",tax_ded)
            print("Final amount: ",final_amt)

        if 2.5<=(income)<5:
            tax = 10
            tax_ded = ((tax/100)*income)
            final_amt = (income)-(tax_ded)
            print("Your annual income: ",income)
            print("Tax percentage applied: ",tax)
            print("Tax deducted: ",tax_ded)
            print("Final amount: ",final_amt)

        if 5<=(income)<10:
            tax = 20
            tax_ded = ((tax/100)*income)
            final_amt = (income)-(tax_ded)
            print("Your annual income: ",income)
            print("Tax percentage applied: ",tax)
            print("Tax deducted: ",tax_ded)
            print("Final amount: ",final_amt)

        if (income)>10:
            tax = 30
            tax_ded = ((tax/100)*income)
            final_amt = (income)-(tax_ded)
            print("Your annual income: ",income)
            print("Tax percentage applied: ",tax)
            print("Tax deducted: ",tax_ded)
            print("Final amount: ",final_amt)     

    elif gender == "f":
        if 1<(income)<(2.5):
            tax = 0
            tax_ded = ((tax/100)*income)
            final_amt = (income)-(tax_ded)
            print("Your annual income: ",income)
            print("Tax percentage applied: ",tax)
            print("Tax deducted: ",tax_ded)
            print("Final amount: ",final_amt)

        if 2.5<=(income)<5:
            tax = 5
            tax_ded = ((tax/100)*income)
            final_amt = (income)-(tax_ded)
            print("Your annual income: ",income)
            print("Tax percentage applied: ",tax)
            print("Tax deducted: ",tax_ded)
            print("Final amount: ",final_amt)

        if 5<=(income)<10:
            tax = 10
            tax_ded = ((tax/100)*income)
            final_amt = (income)-(tax_ded)
            print("Your annual income: ",income)
            print("Tax percentage applied: ",tax)
            print("Tax deducted: ",tax_ded)
            print("Final amount: ",final_amt)

        if (income)>10:
            tax = 20
            tax_ded = ((tax/100)*income)
            final_amt = (income)-(tax_ded)
            print("Your annual income: ",income)
            print("Tax percentage applied: ",tax)
            print("Tax deducted: ",tax_ded)
            print("Final amount: ",final_amt)
    else:
        print("Wrong input!!")

    print(incometax_calc())