求助python yes or no 的选择问题

shierhan

python 代码：

    numsExit = []
    inputExit = eval(input("Y退出，N继续："))
    numsExit.append(eval(inputExit))
    if (numsExit[0] == y) or (numsExit[0] == y):
        break
    else:
        continue
报错：
Traceback (most recent call last):
  File "D:\PYECourse\CalStatisticsV1.py", line 45, in <module>
    inputExit = eval(input("Y退出，N继续："))
  File "<string>", line 1, in <module>
NameError: name 'y' is not defined

Charles未晞

y要加''
即：

1. if (numsExit[0] == 'y') or (numsExit[0] == 'y'):

复制代码

shierhan

我试过：

Traceback (most recent call last):
  File "D:\PYECourse\CalStatisticsV1.py", line 45, in <module>
    inputExit = eval(input("Y退出，N继续："))
  File "<string>", line 1, in <module>
NameError: name 'y' is not defined

shierhan

while True:
    main()
   
    numsExit = []
    inputExit = eval(input("Y退出，N继续："))
    numsExit.append(eval(inputExit))
    if (numsExit[0] == 'y') or (numsExit[0] == 'Y'):
        sys.exit()
        #break
    else:
        continue

塔利班

你这里根本没必要用eval
执行eval的结果是将你输入的字符串‘y’识别成变量
你之前还没定义过

shierhan

while True:
    main()
   
    numsExit = []
    inputExit = (input("Y退出，N继续："))
    numsExit.append(eval(inputExit))
    if (numsExit[0] == 'y') or (numsExit[0] == 'Y'):
        sys.exit()
        #break
    else:
        continue

Y退出，N继续：y
Traceback (most recent call last):
  File "D:\PYECourse\CalStatisticsV1.py", line 46, in <module>
    numsExit.append(eval(inputExit))
  File "<string>", line 1, in <module>
NameError: name 'y' is not defined
>>>