python exceptionの使い方
概要
- 基底クラス
Exceptionがあり、これを継承することで独自の例外を作ることができる - 評価順は通常のオブジェクト指向と同じ
具体例
class SalaryNotInRangeError(Exception):
"""Exception raised for errors in the input salary.
Attributes:
salary -- input salary which caused the error
message -- explanation of the error
"""
def __init__(self, salary, message="Salary is not in (5000, 15000) range"):
self.salary = salary
self.message = message
super().__init__(self.message)
def __str__(self):
return f'{self.salary} -> {self.message}'
salary = int(input("Enter salary amount: "))
if not 5000 < salary < 15000:
raise SalaryNotInRangeError(salary=salary, message="Salary is not in (5000, 15000) range")
"""
Enter salary amount: 2000
Traceback (most recent call last):
File "~/.tmp/tmp.py", line 20, in <module>
raise SalaryNotInRangeError(salary)
__main__.SalaryNotInRangeError: 2000 -> Salary is not in (5000, 15000) range
"""