python 自己定义异常

通过创建一个新的异常类,就可以命名自己的异常,异常应该是典型的继承自Exception类

例如:

# 定义了一个自己的异常类,可在适当时候通过raise来触发它
class
ExError(Exception): pass def exrror(num): if num ==100: raise ExError("the num must not be %d" %num) else: print(num) exrror(100)


“““
---------------------------------------------------------------------------
ExError                                   Traceback (most recent call last)
<ipython-input-28-febd2db30885> in <module>()
      9         print(num)
     10 
---> 11 exrror(100)

<ipython-input-28-febd2db30885> in exrror(num)
      5 def exrror(num):
      6     if num ==100:
----> 7         raise ExError("the num must not be %d" %num)
      8     else:
      9         print(num)

ExError: the num must not be 100

”””
原文地址:https://www.cnblogs.com/wqpkita/p/7682771.html