python - "or"条件导致 "if"出现问题

Question

我在处理函数中的 或 条件时遇到问题。无论 choice 的值是多少，if 语句都会一直评估为 True。当我删除 or 时，if 正常工作。

def chooseDim ():
    **choice = input ('Do you need to find radius or area? ')
    if choice == 'A' or 'a':**
        area = 0
        area = int(area)
        areaSol ()

    elif choice == 'R' or 'r':

        radSol ()

    else:
        print ('Please enter either A/a or R/r.')
        chooseDim ()

Answer 1

'a' 的计算结果为 True，因此您需要正确构建 if 语句。

def chooseDim ( ):
**choice = input ('Do you need to find radius or area? ')
if choice == 'A' or choice == 'a':**
    area = 0
    area = int(area)
    areaSol ( )

elif choice == 'R' or choice == 'r':

    radSol ( )

else:
    print ('Please enter either A/a or R/r.')
    chooseDim ( )