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python异常触发及自定义异常类

作者:互联网

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)) 

 

标签:__,Exception,自定义,python,self,point1,point2,异常,class
来源: https://www.cnblogs.com/imhuanxi/p/11298980.html