Question

刚刚开始玩python遇到了一个小问题简单的示例广场区域，具有错误输入的异常处理当正确输入整数时工作 - 但是我应该输入和字符串或字符 - 我得到Traceback（最近一次调用最后一次）：文件＆＃34; ex3.py＆＃34;，第29行，in 面积=宽度*长度 TypeError：*：＆＃39; NoneType＆＃39;不支持的操作数类型和＆＃39; int＆＃39;

#!/usr/bin/python

def error():
        print "no parameter entered - please enter parameter"

def get_width():
        width = None
        try:
                width = int(raw_input("please enter width of the room in meters: "))
                return width
        except:
                error()
                get_width()

def get_length():
        length = None
        try:
                length = int(raw_input("please enter length of the room in meters: "))
                return length

        except:
                error()
                get_length()

print "\nExercise 3: Area of a Room"

width = get_width()
length = get_length()
area = width * length

print "The area of a room with a width of "+str(width)+" and a length of "+str(length)+" is "+str(area)+" squared meters\n"

任何帮助/解释都会非常感谢

Answer 1

你进行递归通话，但结果不会到达任何地方。你需要退货。例如：

return get_width()

函数Python中的Try / Exception

1 个答案: