Python Trick: Make your program look simple and clean, with the help of dictionary:

When you have multiple object in you program, it often looks messy with different object name being used to call corresponding methods. Let’s see with an example:

class Dog:
    def __init__(self,name):
        self.talents=[]
        self.name=name
    def add_talent(self,talent):
        self.talents.append(talent)

dog_obj1 = Dog('Peddy')
dog_obj2 = Dog('Magnet')

dog_obj1.add_talent('Black Plet')
dog_obj1.add_talent('Fisher Dog')

dog_obj2.add_talent('Guard Dog')
dog_obj2.add_talent('Happy Eater')

print("Talent of Peddy")
print(dog_obj1.talents)

print("\nTalent of Magnet")
print(dog_obj1.talents)

#Output

Talent of Peddy

['Black Plet', 'Fisher Dog']

Talent of Magnet

['Black Plet', 'Fisher Dog']

here above if you see, we have Dog class which has a constructor which initialize two instance object talents (list obj) and  name and we have one instance method add_talent which add the talent of Dog object.

In later part of code, we have declared two object dog_obj1(‘Peddy’) and dog_obj2(‘Magnet’), and then we are calling add_talent method to add talent of Peddy and Magnet.

The code all ok, but just imagine when you have plenty of object in you program, then your program may look quite messy with different objects name.

So what could be the way?

Simple, simple create a dictionary with list of object key value pair and access each object instance variable and method with dictionary object key value. Look at below code snippet

# creating dictionary of Dog
obj_dict={
    'Peddy':dog_obj1,
    'Magnet':dog_obj2
}

# Accessing instance valriable of class
print(obj_dict['Peddy'].talents)
print(obj_dict['Magnet'].talents)

# To add new talent of Paddy, it would be qutie simple"
obj_dict['Peddy'].add_talent('Wolf mound')

#Printing talent of Peddy
print(obj_dict['Peddy'].talents)

#OUTPUT

['Black Plet', 'Fisher Dog']

['Guard Dog', 'Happy Eater']

['Black Plet', 'Fisher Dog', 'Wolf mound']

So here we created a dictionary object obj_dict with list of Dog class object with key value pair Peddy and Magnet. There after we are accessing the Peddy and Magnet talent with dictionary key

obj_dict['Peddy'].talents

obj_dict['Magnet'].talents

Now if we want to add new talent of Peddy then it quite simple:

obj_dict['Peddy'].add_talent('Wolf mound')

This way, your program looks very less messy and much readable.

Enjoy pythonic way J

Post Reference: Vikram Aristocratic Elfin Share