Question

＆＃13;

credit_num = input("Enter the credit card number: ").replace(" ", "")
tot1 = 0 
tot2 = 0 

for i in credit_num[-1::-2]:
    tot1 += int(i)

for i in credit_num[-2::-2]:
    tot2 += sum(int(x) for x in str(int(i)*2))

rem = (tot1 + tot2) % 10

if rem == 0:
    print("The entered numbers are valid.")
else:
    print("The entered numbers are not valid.")

＆＃13;

这适用于Python 3.5。我要修改什么才能在Python 2.7中工作？

Answer 1

将input()替换为raw_input()并将打印函数调用更改为print语句，或者您可以从print_function导入__future__，如@BrenBarn所示，例如：

from __future__ import division, print_function

credit_num = raw_input("Enter the credit card number: ").replace(" ", "")
tot1 = 0 
tot2 = 0 

for i in credit_num[-1::-2]:
    tot1 += int(i)

for i in credit_num[-2::-2]:
    tot2 += sum(int(x) for x in str(int(i)*2))

rem = (tot1 + tot2) % 10

if rem == 0:
    print("The entered numbers are valid.")
else:
    print("The entered numbers are not valid.")

Answer 2

如果你想在Python 2.x和Python 3.x中使用相同的脚本，我建议使用“six”模块和以下代码。（请注意，前两个添加的行是我所做的唯一更改。）

var vehicles = [string]()
let mustang = Car() // car is a class name
mustang.brandName = "Ford"
mustang.modelName = "Mustang" // string type
mustang.modelYear = 1968
mustang.isConvertibible = true
mustang.isHatchback = false
mustang.hasSunroof = false // bool type
mustang.numberOfDoors = 2 // int type
mustang.powerSource = "gas engine"

// Add it to array
vehicles.append(mustang.brandName)
vehicles.append(mustang.modelName)
vehicles.append(mustang.modelYear) // Error: int type not supported
vehicles.append(mustang.isConvertibible) // Error: bool type not supported
vehicles.append(mustang.brandName)
vehicles.append(mustang.brandName)

我在代码中修改了什么才能在Python 2.7中工作？

2 个答案: