Introduction to Python

Python is a high-level, interpreted, general-purpose programming language. Its design philosophy emphasizes code readability with the use of significant indentation.

Key Features

• Easy to learn and use
• Interpreted language
• Extensive standard library
• Cross-platform compatibility
• Supports multiple programming paradigms

Installation

sudo apt install python3

Or download from python.org.

Data Types

• int
• float
• str
• bool
• list
• tuple
• dict
• set

Operators

• Arithmetic: +, -, *, /, %, **, //
• Assignment: =, +=, -=, etc.
• Comparison: ==, !=, <, >, <=, >=
• Logical: and, or, not

Conditions

if a > b:
    print("a is greater than b")
elif a == b:
    print("a is equal to b")
else:
    print("a is less than b")

Loops

for i in range(5):
    print(i)

while a < 10:
    a += 1

Functions

def greet(name):
    return f"Hello, {name}!"

File Handling

with open("test.txt", "r") as file:
    for line in file:
        print(line)

Class & Object

class Person:
    def __init__(self, name):
        self.name = name
    def greet(self):
        print(f"Hello, my name is {self.name}")
p = Person("Sai")
p.greet()

Other Features

• Exception handling with try/except
• Modules and packages
• Virtual environments