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Microservices

Microservices are architectural style in which large & complex software applications are composed of one or more smaller services.

Microservices are design principles for an application

Four main characteristics:

1. Loosely Coupled: The microservices are not tightly dependent on each other
2. Small & Focused: Each microservice focus on smaller & single task
3. Language Neutral: One microservice can be written in JAVA for performance benefits and other in Python for quicker deployment

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Design Patterns

Definition

Design Patterns are solutions to to commonly occurring problems.

We need design patterns to ensure our work is consistent, reliable and understandable.

Examples

• Building Architecture
• Electrical and plumbing

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import threading
import time
import random
import concurrent.futures

numbers = list(range(1, 11))


def product(num):
    for i in range(1, 10000000):

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from __future__ import print_function

from abc import ABCMeta, abstractmethod


class Button:
    __metaclass__ = ABCMeta

    @abstractmethod
    def paint(self):

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Python Important Topics

Fundamentals

• list
• tuple
• dict
• set
• frozen set
• Builtin functions: map, filter, reduce, vars, zip, enumerate
• lambda

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def get_lines_in_chunks(file_path: str, chunks: int = 1) -> list:
    """Get specified no. of lines from file

    :param chunks: No. of lines (Default=1)
    :param file_path: Absolute path to file
    :return: list of lines from the file
    """
    with open(file_path) as f:
        def _get_lines(chunks):
            return [f.readline() for _ in range(chunks)]

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class ListAddition:

    def __init__(self, numbers):
        self.x = numbers

    def __add__(self, other):
        return [self.x, other.x]


x = ListAddition([1, 2, 3])

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"""Bottle framework demonstration

Below items are demonstrated here:
==================================
- Login/Logout using cookies
- File upload/download
- Hooks
- Plugins
- 404 error handling
- Jinja2 template usage

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import sys

class CommonAttributes:

    def __init__(self):
        self.name = 'common'

class MissingAttributes:

    def __init__(self):