create custom exception python

1class SalaryNotInRangeError(Exception):
2    """Exception raised for errors in the input salary.
3
4    Attributes:
5        salary -- input salary which caused the error
6        message -- explanation of the error
7    """
8
9    def __init__(self, salary, message="Salary is not in (5000, 15000) range"):
10        self.salary = salary
11        self.message = message
12        super().__init__(self.message)
13
14    def __str__(self):
15        return f'{self.salary} -> {self.message}'
16
17
18salary = int(input("Enter salary amount: "))
19if not 5000 < salary < 15000:
20    raise SalaryNotInRangeError(salary)

1raise Exception "FileError: \nCould not read file."

1class UnderAge(Exception):
2   pass
3 
4def verify_age(age):
5   if int(age) < 18:
6       raise UnderAge
7   else:
8       print('Age: '+str(age))
9 
10# main program
11verify_age(23)  # won't raise exception
12verify_age(17)  # will raise exception

1class CustomError(Exception):
2  	pass