with open("sample.txt", "w") as file:
    file.write("Hello, Stefina!\nThis is a sample file created by Python.\nWelcome to file handling!")
with open("sample.txt", "r") as file:
    content = file.read()
    print("File Content:\n")
    print(content)

File Content:

Hello, Stefina!
This is a sample file created by Python.
Welcome to file handling!

with open("output.txt", "w") as file:
    file.write(input("Enter text to write: "))

Enter text to write:  AI Engineer

with open("output.txt", "a") as file:
    file.write("\n" + input("Enter text to append: "))

Enter text to append:  passionate in Deep leaning

with open("sample.txt", "r") as file:
    lines = file.readlines()
    print("Line count:", len(lines))

Line count: 3

with open("sample.txt", "r") as file:
    words = file.read().split()
    print("Word count:", len(words))

Word count: 14

with open("sample.txt", "r") as file:
    text = file.read()
    print("Character count:", len(text))

Character count: 82

with open("sample.txt", "r") as file:
    words = file.read().split()
    print("Longest word:", max(words, key=len))

Longest word: handling!

with open("sample.txt", "r") as src, open("copy.txt", "w") as dest:
    dest.write(src.read())

import os

filename = "sample.txt"
print("File exists" if os.path.exists(filename) else "File does not exist")

File exists

import os

filename = "newfile.txt"
if not os.path.exists(filename):
    open(filename, "w").close()
    print("File created")
else:
    print("File already exists")

File created

with open("oldname.txt", "w") as file:
    file.write("This is the file you will rename.")

import os

if os.path.exists("oldname.txt"):
    os.rename("oldname.txt", "newname.txt")
    print("File renamed")
else:
    print("File 'oldname.txt' not found.")

File renamed

with open("sample.txt", "r") as file:
    text = file.read().lower()
    vowels = "aeiou"
    count = sum(1 for ch in text if ch in vowels)
    print("Vowel count:", count)

Vowel count: 24

def add(a, b): return a + b
def sub(a, b): return a - b
def mul(a, b): return a * b
def div(a, b): return a / b

a = float(input("Enter first number: "))
b = float(input("Enter second number: "))
op = input("Enter operation (+, -, *, /): ")

if op == '+':
    print(add(a, b))
elif op == '-':
    print(sub(a, b))
elif op == '*':
    print(mul(a, b))
elif op == '/':
    print(div(a, b))
else:
    print("Invalid operator")

Enter first number:  20
Enter second number:  30
Enter operation (+, -, *, /):  /


0.6666666666666666

todo = []

while True:
    task = input("Enter task (or 'done' to exit): ")
    if task.lower() == 'done':
        break
    todo.append(task)

print("Your To-Do List:")
for i, task in enumerate(todo, 1):
    print(f"{i}. {task}")

Enter task (or 'done' to exit):  23
Enter task (or 'done' to exit):  20
Enter task (or 'done' to exit):  22
Enter task (or 'done' to exit):  done


Your To-Do List:
1. 23
2. 20
3. 22

with open("numbers.txt", "w") as file:
    file.write("10 20 30 40")  
with open("numbers.txt", "r") as file:
    numbers = map(int, file.read().split())
    print("Sum:", sum(numbers))

Sum: 100

with open("numbers.txt", "w") as file:
    file.write("5 15 25 35") 
try:
    with open("numbers.txt", "r") as file:
        numbers = map(int, file.read().split())
        print("Sum:", sum(numbers))
except FileNotFoundError:
    print("Error: 'numbers.txt' file not found.")
except ValueError:
    print("Error: The file contains non-integer values.")

Sum: 80

import keyword

with open("sample.txt", "r") as file:
    text = file.read()
    words = text.split()
    count = sum(1 for word in words if word in keyword.kwlist)
    print("Keyword count:", count)

Keyword count: 1

import random

words = ["python", "hangman", "code"]
word = random.choice(words)
guesses = ''
turns = 6

while turns > 0:
    failed = 0
    for ch in word:
        if ch in guesses:
            print(ch, end=" ")
        else:
            print("_", end=" ")
            failed += 1
    print()
    if failed == 0:
        print("You Win!")
        break
    guess = input("Guess a letter: ")
    guesses += guess
    if guess not in word:
        turns -= 1
        print("Wrong! Attempts left:", turns)
        if turns == 0:
            print("You Lose! Word was:", word)

_ _ _ _ _ _ _


Guess a letter:  c


Wrong! Attempts left: 5
_ _ _ _ _ _ _


Guess a letter:  p


Wrong! Attempts left: 4
_ _ _ _ _ _ _


Guess a letter:  g


_ _ _ g _ _ _


Guess a letter:  h


Wrong! Attempts left: 3
h _ _ g _ _ _


Guess a letter:  a


h a _ g _ a _


Guess a letter:  n


h a n g _ a n


Guess a letter:  m


h a n g m a n 
You Win!

import random

num = random.randint(1, 100)
while True:
    guess = int(input("Guess the number (1-100): "))
    if guess < num:
        print("Too low!")
    elif guess > num:
        print("Too high!")
    else:
        print("Correct! You guessed it.")
        break

Guess the number (1-100):  50


Too low!


Guess the number (1-100):  60


Too low!


Guess the number (1-100):  70


Too low!


Guess the number (1-100):  80


Too low!


Guess the number (1-100):  90


Too high!


Guess the number (1-100):  85


Too high!


Guess the number (1-100):  81


Too low!


Guess the number (1-100):  82


Too low!


Guess the number (1-100):  83


Too low!


Guess the number (1-100):  84


Correct! You guessed it.

import random

choices = ['rock', 'paper', 'scissors']
player = input("Choose rock, paper or scissors: ").lower()
computer = random.choice(choices)

print("Computer chose:", computer)

if player == computer:
    print("It's a tie!")
elif (player == 'rock' and computer == 'scissors') or \
     (player == 'scissors' and computer == 'paper') or \
     (player == 'paper' and computer == 'rock'):
    print("You win!")
else:
    print("You lose!")

Choose rock, paper or scissors:  paper


Computer chose: rock
You win!