Playground repo for Python projects

This is a learning repo with different projects/proof of concepts for playing with Python technologies/frameworks.

Table of Contents

• Status Updates
  • Day 1
  • Day 2
  • Day 3
  • Day 4
  • Day 5
  • Day 6
  • Day 7
  • Day 8
  • Day 10
  • Day 12
  • Day 13
• Installation
• Resources

Status Updates

As part of 21 days of lockdown, I started learning python from March 25th, 2020.

Day 1

• cd pipenv
• pipenv install - Similar to npm install. Creates 2 files Pipfile and Pipfile.lock similar to package-lock.json in the javascript world with dependencies based on requirements.txt
• pipenv shell - Activates the virtual environment. Much simpler than virtualenv
• Once the shell is activated, run python3 hello.py to bring the Flask app UP!!
• By default the flask app runs on 5000 port - http://localhost:5000/hello
• pipenv install PyPDF2 - installs the PyPDF2 package and updates Pipfile and Pipfile.lock files.
• Once the shell is activated, run python3 pdf_reader.py to read the example.pdf file
• basics.py - file which includes all basic syntaxes in python
• modules.py
  • python searches the list of directories from sys.path. Use sys.path.append(directory_path) to add directory searches during import.

    python3          
    Python 3.7.5 (default, Nov  1 2019, 02:16:32) 
    [Clang 11.0.0 (clang-1100.0.33.8)] on darwin
    Type "help", "copyright", "credits" or "license" for more information.
    >>> import sys
    >>> sys.path
    ['', '/usr/local/Cellar/python/3.7.5/Frameworks/Python.framework/Versions/3.7/lib/python37.zip', '/usr/local/Cellar/python/3.7.5/Frameworks/Python.framework/Versions/3.7/lib/python3.7', '/usr/local/Cellar/python/3.7.5/Frameworks/Python.framework/Versions/3.7/lib/python3.7/lib-dynload', '/usr/local/lib/python3.7/site-packages']

  • Alternatively use PYTHONPATH to set the package/module import paths.
  • If a package has __init__.py, it becomes a module
  • learn is a module which is used in modules.py

Day 2

• cd functions
• Started using callable functions inside a class

Day 3

• Started using Functions and String manipulation

Day 4

• cd tuples
• Started using tuples

Day 5

• cd dictionaries
• Started using dictionaries
• Started using set

Day 6

• Started with class usage and best practices

Day 7

• class methods
• static methods

Day 8

• class equals and repr
• Data Class usage

Day 10

• Files and Directories

Day 12

• Lambda

Day 13

• Solving LeetCode program - Problem

Installation

Command used in Mac for installing supporting tools

• Python3 - brew install python3
• Pipenv - brew install pipenv

Resources

• Introducing Python - Oreilly - Most exhaustive and amazing book..!
• Projects to build after learning pythong