Build a Salary Tracker - Step 40

Python
1

Tell us what’s happening:

On step 40, I got stuck because I can’t understand how to make it call the salary setter instead of modifying the attribute. Can you please explain what I should do.

Your code so far

class Employee:
    _base_salaries = {
        'trainee': 1000,
        'junior': 2000,
        'mid-level': 3000,
        'senior': 4000,
    }

    def __init__(self, name, level):
        self.name = name
        self.level = level
        self.salary = Employee._base_salaries[level]

    def __str__(self):
        return f'{self.name}: {self.level}'

    def __repr__(self):
        return f"Employee('{self.name}', '{self.level}')"

    @property
    def name(self):
        return self._name

    @name.setter
    def name(self, new_name):
        if not isinstance(new_name, str):
            raise TypeError("'name' must be a string.")
        self._name = new_name
        print(f"'name' updated to '{self.name}'.")

    @property
    def level(self):
        return self._level

    @level.setter
    def level(self, new_level):
        if not isinstance(new_level, str):
            raise TypeError("'level' must be a string.")
        if new_level not in Employee._base_salaries:
            raise ValueError(f"Invalid value '{new_level}' for 'level' attribute.")
        if hasattr(self, '_level') and new_level == self.level:
            raise ValueError(f"'{self.level}' is already the selected level.")
        if hasattr(self, '_level') and Employee._base_salaries[new_level] < Employee._base_salaries[self.level]:
            raise ValueError("Cannot change to lower level.")
        print(f"'{self.name}' promoted to '{new_level}'.")

# User Editable Region

        self._salary = Employee._base_salaries[new_level]

# User Editable Region

        self._level = new_level

    @property
    def salary(self):
        return self._salary

    @salary.setter
    def salary(self, new_salary):
        if not isinstance(new_salary, (int, float)):
            raise TypeError("'salary' must be a number.")
        if hasattr(self, '_level') and new_salary < Employee._base_salaries[self.level]:
            raise ValueError(f'Salary must be higher than minimum salary ${Employee._base_salaries[self.level]}.')
        self._salary = new_salary
        print(f'Salary updated to ${self.salary}.')

charlie_brown = Employee('Charlie Brown', 'trainee')
print(charlie_brown)
print(f'Base salary: ${charlie_brown.salary}')
charlie_brown.level = 'junior'

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Challenge Information:

Build a Salary Tracker - Step 40

GitHub Link: freeCodeCamp/curriculum/challenges/english/blocks/workshop-salary-tracker/68cab17ac51b861a8458c42d.md at main · freeCodeCamp/freeCodeCamp · GitHub

2

Hi @rifaebox,

Take another look at this theory lecture:

Understanding Object Oriented Programming and Encapsulation - What are Getters and Setters | Learn | freeCodeCamp.org

Here are a couple of relevant excerpts:

Notice how we used _radius instead of radius inside the class. The underscore is a common Python convention to show that an attribute is meant to be private. In other words, it signifies that it’s for internal use and should not be accessed directly from outside the class.

Once you define getters and setters, Python automatically calls them under the hood whenever you use normal attribute syntax:

Happy coding!

3

thank you so much i finally solved it