Python Classroom notes 27/Aug/2024

Project Euler Problem 2

• Refer Here for problem statement
• Instructions

1. Hello flora
2. a = 1
3. b = 2
4. result = 2
5. c = a + b
6. if c%2 == 0
    6.1 result = result + c
7 a = b
8. b = c
9. if a + b < 4 million
    9.1. go to step 5
10. print result

Python

• Python has different compilers available out of which CPython is most widely used.
• Python has important principles embedded
• Zen of Python (PEP-20) Refer Here
  
• Python Style Guide Refer Here
• Python is developed by opensource communitiy Refer Here
• Python creates a PEP (Python Enhancement Proposal) for all the features
• Ensure Pylint extension is installed
  

Hello World python program

• Create a file called as helloworld.py

"""
This is my first program
"""

print("Welcome to python")

• Executing the program python helloworld.py
• Executing the program from visual studio code
  • Navigate to Run => Start without Debugging
• Open Command pallete in visual studio code ctrl+ shift + p and Type Terminal: Focus Terminal
  
  

Basic Data Types in Python

• Refer Here for article of Datatypes in Python
• Also refer w3schools, geekforgeeks, Programiz
  
• REPL (Read evaluate Print loop) can be opened by typing python in shell
• Note: We have interesting functions
  • type
  • print
    

Naming conventions

• Pascal Casing:
  • myworld => MyWorld
  • account => Account
  • myfirstaccount => MyFirstAccount
• Camel casing:
  • myworld => myWorld
  • account => account
  • myfirstaccount => myFirstAccount
• Captial casing
  • myworld => MYWORLD
  • account => ACCOUNT
  • myfirstaccount => MYFIRSTACCOUNT
• Snake casing
  • myworld => my_world
  • account => account
  • myfirstaccount => my_first_account
• CAPITAL SNAKE Casing
  • myworld => MY_WORLD
  • account => ACCOUNT
  • myfirstaccount => MY_FIRST_ACCOUNT

Variables in Python

• variable is a name given to some value in python
  
• variable naming conventions
  • use snake casing for variables
  • use capital snake casing for constants
• Python doesnot have constants but if the value does not change use capital snake casing
  

Operators in Python

• Refer Here for operators
• operator precedence Refer Here

Sample Programs on Operators

• Refer Here for numerical operators

Exercises

• Calculate loan emi
• Temparature conversion from degree to farnheit
• Number of seconds so far (hours = 0 minutes = 10 seconds = 11)
• Kilometres to miles
• Kilograms to pounds