python异常触发及自定义异常类解析
时间:2021-03-05 12:40:16|栏目:Python代码|点击: 次
python程序运行中,可由程序抛出异常。
异常触发:使用raise命令抛出异常,即可使用异常基类Exception,也可使用自定义异常类(继承Exception类)。
class Point:
def __init__(self, x, y):
self.x = x
self.y = y
# Define a class to raise Line errors
class LineError(Exception): #继承自基类Exception
def __init__(self,ErrorInfo):
self.errorinfo=ErrorInfo
def __str__(self):
return self.errorinfo
class Line:
def __init__(self, point1, point2):
self.point1 = point1
self.point2 = point2
if point1.x==point2.x and point1.y==point2.y:
raise LineError("Cannot create line")
line = Line(Point(1, 2), Point(1, 2))






