Building Robust Object-Oriented Python Applications and Libraries/

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Solution: Create a Customer Relationship Management System

Solution: Create a Customer Relationship Management System

Learn how to implement the coded solution of the customer relationship management system using Python data structures.

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Create the original structure

Generate the Customer class incorporating id, name, and email attributes. Moreover, add another class named Interaction as well, containing customer_id, interaction_type, and timestamp attributes.

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class Customer:
  id: int
  name: str
  email: str
class Interaction:
  customer_id: int
  interaction_type: str
  timestamp: str

Refactor original classes

Now refactor the Customer class with named tuples and the Interaction class with dataclasses that help us to provide a convenient way to define classes with automatically generated methods. Moreover, refactor a dictionary to a defaultdict and use the counter to track the customer interactions.

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from typing import NamedTuple
from dataclasses import dataclass
from collections import defaultdict, Counter
# Refactor classes with named tuples
class Customer(NamedTuple):
    id: int
    name: str
    email: str
# Refactor classes with dataclasses
@dataclass
class Interaction:
    customer_id: int
    interaction_type: str
    timestamp: str
# Refactor a dictionary to a defaultdict
customer_data = defaultdict(list)
customer_data[1].append(Interaction(1, "Call", "2022-01-01"))
customer_data[1].append(Interaction(1, "Email", "2022-01-02"))
# Use Counter to track interaction frequency
interaction_counter = Counter([interaction.interaction_type for interactions in customer_data.values() for interaction in interactions])

Code explanation

Here’s the explanation of the code written above:

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