Question

我将以下代码作为函数的一部分：

print("Is the fluid water/steam or R-134a: ")
fluid = input()
if fluid.casefold == "water":
    hin = CP.PropsSI('H','P', pin,"T",lower_temp+zeroC, 'water')
    hout = CP.PropsSI('H','P', pout,"T",upper_temp+zeroC, 'water')
    return
elif fluid.casefold == "r134a" or fluid.casefold == "r-134a":
    hin = CP.PropsSI('H','P', pin,"T",lower_temp+zeroC, 'R134a')
    hout = CP.PropsSI('H','P', pout,"T",upper_temp+zeroC, 'R134a')
    return
else:
    print("Invalid Fluid")
    params()

我的代码总是执行else语句，而不是if或elif语句。我是错误地使用了casefold，还是没有看到其他错误

Answer 1

使用fuild.casefold()

print("Is the fluid water/steam or R-134a: ")
fluid = input()
if fluid.casefold() == "water":
    hin = CP.PropsSI('H','P', pin,"T",lower_temp+zeroC, 'water')
    hout = CP.PropsSI('H','P', pout,"T",upper_temp+zeroC, 'water')
    return
elif fluid.casefold() == "r134a" or fluid.casefold() == "r-134a":
    hin = CP.PropsSI('H','P', pin,"T",lower_temp+zeroC, 'R134a')
    hout = CP.PropsSI('H','P', pout,"T",upper_temp+zeroC, 'R134a')
    return
else:
    print("Invalid Fluid")
    params()

如果满足if / elif / else循环执行else语句

1 个答案: