# coding: utf-8

# # Objects in Python

# Everything in Python is an 'object'.
# 
# Defining custom types of objects is easy:

# In[1]:


class Employee:
    def __init__(self, name, salary):
        self.name = name
        self.salary = salary
        
    def fire(self):
        self.salary = 0


# * Functions within the class (type) definition are called 'methods'.
# * They take an explicit `self` parameter, through which the object is passed.
# * `__init__` is the 'constructor'
#     * Objects are created by 'calling' the type like a function.
#     * Arguments in this call are passed to the constructor

# In[11]:

joe = Employee("Joe", 100000)
joe.name


# In[7]:

joe.salary


# Let's fire Joe.

# In[8]:

joe.fire()


# In[9]:

joe.salary


# ## Inheritance

# Types can be based on other types by inheritance:

# In[10]:

class Boss(Employee):
    def __init__(self, name, salary, supervises):
        super(Boss, self).__init__(name, salary)
        
        self.supervises = supervises
        
    def fire(self):
        for s in self.supervises:
            s.fire()
            
        super(Boss, self).fire()


# In[12]:

joe = Employee("Joe", 100000)
jack = Employee("Jack", 100000)
mike = Boss("Mike", 150000, [joe, jack])

mike.salary


# In[13]:

joe.salary


# Now what happens to Joe's salary if Mike gets fired?

# In[14]:

mike.fire()


# In[15]:

joe.salary