Basic Program in Python

name = "Alice"
age = 25
height = 5.4
is_student = True
print(name, age, height, is_student)

x = 15
if x > 10:
    print("Greater than 10")
else:
    print("10 or below")

for i in range(5):
    print("Count:", i)

def greet(name):
    print("Hello,", name)

greet("John")

squares = [n*n for n in range(5)]
print(squares)

numbers = {x: x*2 for x in range(3)}
print(numbers)

text = "python programming"
print(text.capitalize())
print(text.replace("python", "advanced python"))

try:
    print(10 / 0)
except ZeroDivisionError:
    print("Cannot divide by zero!")

class AgeError(Exception):
    pass

age = -1
if age < 0:
    raise AgeError("Age cannot be negative!")

with open("sample.txt", "w") as file:
    file.write("Hello File!")

with open("sample.txt", "r") as file:
    print(file.read())

class Dog:
    def __init__(self, name):
        self.name = name

    def bark(self):
        print(self.name, "says woof!")

Dog("Buddy").bark()

import math
print(math.sqrt(25))

import random
print(random.randint(1, 10))

square = lambda x: x*x
print(square(6))

from functools import reduce

nums = [1, 2, 3, 4]

doubled = list(map(lambda x: x*2, nums))
filtered = list(filter(lambda x: x % 2 == 0, nums))
summed = reduce(lambda a, b: a+b, nums)

print(doubled, filtered, summed)

def counter():
    n = 1
    while n <= 3:
        yield n
        n += 1

for num in counter():
    print(num)

def announce(func):
    def wrapper():
        print("Starting function")
        func()
        print("Function finished")
    return wrapper

@announce
def hello():
    print("Hello!")

hello()

with open("note.txt", "w") as f:
    f.write("Context Manager Example")

def add(a, b):
    return a + b

assert add(2, 3) == 5
print("Test passed!")

def multiply(a: int, b: int) -> int:
    return a * b

print(multiply(3, 4))

import logging

logging.basicConfig(level=logging.INFO)
logging.info("This is an info message")

import requests

response = requests.get("https://jsonplaceholder.typicode.com/todos/1")
print(response.json())

stack = []
stack.append(10)
stack.append(20)
print(stack.pop())  # removes 20

def binary_search(arr, target):
    low, high = 0, len(arr)-1
    while low <= high:
        mid = (low+high)//2
        if arr[mid] == target:
            return mid
        elif arr[mid] < target:
            low = mid + 1
        else:
            high = mid - 1

print(binary_search([1,2,3,4,5], 4))

import threading

def task():
    print("Running task...")

t = threading.Thread(target=task)
t.start()
t.join()

import json

data = {"name": "Alice", "age": 30}
json_str = json.dumps(data)
print(json_str)
print(json.loads(json_str))

import sqlite3

conn = sqlite3.connect(":memory:")
cursor = conn.cursor()

cursor.execute("CREATE TABLE users(name TEXT)")
cursor.execute("INSERT INTO users VALUES ('John')")

conn.commit()
print(cursor.execute("SELECT * FROM users").fetchall())

from flask import Flask
app = Flask(__name__)

@app.route("/")
def home():
    return "Hello Flask!"

app.run(debug=True)

def add_numbers(a: int, b: int) -> int:
    """Return the sum of two numbers."""
    return a + b

print(add_numbers(5, 7))