test.py

print ( 2 < 4 )

min_score = 13
score = 13

print(score > min_score)
print(score <= min_score)

'python'>'Python'

x = -10
if x < 0:
   print("The negative number ",  x, " is not valid here.")
print("This is always printed")

if 4 + 5 == 10:
   print("TRUE")
else:
   print("FALSE")
print("TRUE")


1st if statement
if True: print('hello')

2nd if statement
if (5,10):
   print('hello')

3rd if statement
if (yes):
   print('hello')

4th if statement
if (5,10): print('hello')

x = 0
a = 6
b = 6
if a > 0:
    if b < 0: 
        x = x + 6 
    elif a > 6:
        x = x + 5
    else:
        x = x + 4
else:
    x = x + 3

print(x)

num_1 = int(input("enter first number = "))
num_2 = int(input("Enter second number = "))

total = num_1 + num_2

print("the total is = ", total)

for letter in "python":
    print(letter)

import pyjokes

jokes = pyjokes.get_joke()

print(jokes)

import math

for i in range(1, 11):
    i = i * 5
    print(i)

import pyttsx3
engine = pyttsx3.init()

engine.say("""
I met an old woman at the bus stop today.
She talked to me, but I didn’t know what to say.
‘Your little brother looks smart,’ she said.
But I didn’t know what to say.

‘I’m from Romania,’
‘I’ve been here six years,’
‘I sleep in the shelters.”
I held my brother’s hand tighter.""")
engine.runAndWait()


import os

print(os.listdir('.'))

print(os.getcwd())

print(os.open('test.py', os.O_RDONLY))


directory_path = "/"

contents = os.listdir(directory_path)

for item in contents:
    print(item)

a = "This is the first line \nthis is the second line"
print(a)

name = input("Enter your name: ")

print(f"Good Afternoon {name}")

letter = """Dear <|Name|>,
        You are selected!
        <|Date|>"""

print(letter.replace("<|Name|>", "Anirban").replace("<|Date|>", '13th sept, 1996'))

name = "harry  isagoodboyandagreatabuddy"

if (name.find("goo")):
    print(name.index("goo"))

name = "harry  is a good boy and a great buddy"
 
print(name.replace("  ", " "))

letter = "Dear Harry, \n\tThis is Python course. \nThanks!"
print(letter)

friends = ["Anirban", "Satyarth", "Orange", 1, 345.6 , False, "Rohit", "Satyarth"]
print(friends[1:5])

friends[0] = "Anirban Das"    #Unlike strings, lists are mutable, which means we can change their content without changing their identity.
print(friends)

friends.append("Harry")
print(friends)

friends.insert(1, "Satyarth")
print(friends)

friends.remove("Satyarth")
print(friends)

friends.pop(1)
print(friends)

l1 = [1, 5, 3, 9, 2]

l1.sort()
print(l1)

l1.reverse()
print(l1)

l1.insert(3, 333333)
print(l1)

marks = []
m1 = input("Enter the marks of 5 students separated by space: ").split()
marks = [int(i) for i in m1]
print(marks)

a = (1, 2, 3, 4, 5, 5, 5, 5, 5, 5)

n = a.count(5)
print(n)

marks = {
    "Anirban": 95,
    "Satyarth": 90,
    "Rohit": 85,
    "Harry": 80
}

# # print(marks, type(marks))

# print(marks["Anirban"])

marks.update({"Anirban": 99})

print(marks.get("Anirban"))

print(marks.keys())

print(marks.values())

print(marks.items())

empty_set = set() #This is an empty set, also no values can be repeated

s = {1, 2, 3, 4, 5, 5, 5, 5}

s.add(6)

print(s)

s1 = {1, 2, 3, 4, 5}
s2 = {4, 5, 6, 7, 8}

print(s1.union(s2)) #union of two sets₹

print(s1.intersection(s2)) #intersection of two sets

translations = {
    "hello": "hola",
    "goodbye": "adios",
    "thank you": "gracias",
    "please": "por favor"
}

# print(translations.get("hello"))

word = input("Enter a word to translate: ")
print(translations.get(word, "Translation not found."))

numbers = int(input("Enter 8 numbers separated by space: "))
print(numbers)

s = set()
s.add(20)
s.add('10')
s.add(20.0)
print(len(s))

dic = {}

n1 = input("Enter the name of the student: ")
m1 = int(input("Enter the marks of the student: ")) 

dic.update({n1: m1})
print(dic)

age = int(input("Enter your age: "))
if age < 18:
    print("You are a minor.")
elif age >= 18 and age < 65:
    print("You are an adult.")
else:
    print("You are a senior citizen.")

****SPAM FILTER****

m1 = "buy now"
m2 = "limited time offer"
m3 = "click this"

message = input("Enter your message: ")

if (m1 in message) or (m2 in message) or (m3 in message):
    print(f"This message is spam, In contains {message}" )  
else:    
    print("This message is not spam.")

loops in python#

for i in range(1, 11, 2):
    print(i)

i = 1

while i <= 10:
    print(i)
    i += 1

for i in "harry":
    print(i)

i = 0

while i < 5:
    i = i + 1
    print("harry")

list = [1, "hello", 3.14, True]

i = 0

while (i < len(list)):
    print(list[i])
    i += 1

for i in range(4):
    print(i)


l = [1, 2, 3, 4, 5]

for item in l:
    print(item)
else:
    print("This is end...")

for i in range(100):
    if i == 34:
        break #exirt the loop right now
    print(i)


for i in range(100):
    if i == 34:
        continue #skip the current iteration and move to the next one
    print(i)

table = int(input("Enter the number to print its multiplication table: "))
for i in range(1, 11):
    print(f"{table} x {i} = {table * i}")


l = ["harry", "Soham", "Sachin", "rohit"]

for name in l:
    if(name.startswith("S")):
        print(f"Hello, {name}!")


i = 1

while i < 11:
    print(f"{table} x {i} = {table * i}")
    i += 1

n = int(input("Enter a number: "))
i = 1
sum = 0
while i <= n:
    sum += i 
    i += 1

print(sum)

n = int(input("Enter a number: "))
i = 1
factorial = 1
while i <= num:
    factorial *= i
    i += 1
print(factorial)

for i in range(1, n+1):
    print(" " * (n-i), end="")
    print("*" * (2*i-1), end="")
    print("")

def input_number(num):
    return int(input("Enter a number : ")) * num

print(input_number(num = 10))

a = 0
def add_three(a):
	return a+3

result = add_three(3)
print(result)

def add_func(num1,num2):
        return num1 + num2
print ( add_func(5 , 5) )

def my_function(*friends):
  print("The tallest student is " + friends[0])

my_function("john", "Ella", "mark")


def fullname_func(fname):
  print(fname + " Mark")

fullname_func("John")

def fullname_func(fname, lname):
  print(fname + " " + lname)

fullname_func("John", "Mark")

def print_sum (num1, num2):
    sum = num1 + num2
    if(sum==0):
        return True
    print("The sum is: " + str(sum))
print_sum(-1, 1)

def square(i):
    j = i * i
    return j

print(square(3))

def is_true(a): 
  return bool(a)
result = is_true(3<6) 
print("The result is", result)

def square(i):
    j = i * i
    return j

num = 2
result = square(num)
print("The result of ", num, " is ", result)

def return_greeting():
  return "Hello, World"

print(return_greeting())

def my_function(x):
  return 5 + x

print(my_function(3))

def add(x, y):
  return x+y

def my_function(x):
  return 10 - x

print(my_function(4))

def my_function(x):
  return 10 / x
print(my_function(2))

def is_true(a): 
  return bool(a) 

result = is_true(6<3) 
print("The result is", result)

def multiply_values(list):
    multiplied_values = []
    
    for item in list:
        multiplied_values.append(item * 2)
    
    return multiplied_values

numbers = [1, 2, 3, 4, 5]
print(multiply_values(numbers))

def get_odd_func(numbers):
    odd_numbers = [num for num in numbers if num % 2]
    return odd_numbers

print(get_odd_func([1, 2, 3, 4, 5, 6]))

def get_even_func(numbers):
    even_numbers = [num for num in numbers if not num % 2]
    return even_numbers

print(get_even_func([1, 2, 3, 4, 5, 6]))


def mean_func(list1):
    return sum(list1) / len(list1)

print(mean_func([5, 2, 2, 4]))

def my_function(numbers):
  for i in numbers:
    print(i+1, end=' ')

numbers = [1, 2, 3] 
my_function(numbers)

def my_function(numbers):
  for i in numbers:
    print(i*2+10, end=' ')

numbers = [1, 2, 3]
my_function(numbers)

def my_function(names):
  for i in names:
    print(i, end=' ')

names = ["john", "mark", "emmy"]
my_function(names)

def double_list(numbers):
  return 2 * numbers

numbers = [1, 2, 3]
print(double_list(numbers))

def mean_func(list1):
    return sum(list1) / len(list1)

print(mean_func([5, 6, 7, 8]))

def my_function():
  def my_inner_function():
    x = 20
  print(x)
  my_inner_function()

my_function()


x = 30
def my_function():
  global x
  x = 20

my_function()
print(x)

x = 20
def my_function():
  print(x, end=' ')

my_function()
print(x, end=' ')

def my_function():
  def my_inner_function():
    x = 20
    print(x)
  my_inner_function()

my_function()


x = 20
def my_function():
  x = 30
  print(x, end=' ')

my_function()
print(x, end=' ')

def myfunc():
  a = 20
  print(a)

myfunc()

def myfunc():
  a = 20

myfunc()
print(a)

def my_function():
  global x
  x = 30

my_function()
print(x)


def my_function():
  x = 20
  def my_inner_function():
    print(x)
  my_inner_function()
my_function()

x = 20
def my_function():
  x = 30
  print(x, end=' ')

my_function()


def sum(*args):
    for arg in args:
        result += arg
    return result 

print(sum(2,3,1))

def my_function(*argv):
  print(argv[0])

my_function('Hello', 'World!')

def division(a,b):
    return a/b

print(division(8,2))

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

print(sum(2,3))

def my_function(*ages):
  print("The older friend is " + ages[0] + " years")

my_function("13", "12", "11")


def my_function(*argv):  
    for arg in argv:  
        print(arg) 

my_function('Hello', 'World!')


def my_function(*argv):
  print(argv)

my_function('Hello', 'World!')

def my_function(arg1, *argv): 
    print ("First argument:", arg1) 
    for arg in argv: 
        print("Next argument:", arg) 

my_function('Welcome', 'to', 'Python!')

tuple1 = (0, 1, 2, 3, 4, 5)

print(tuple1[0:4])

x = tuple(3)
print(x)

a = (10, [20, 30], 40, 50)

print(a.index(30))

a = (10, 20, 30, 40, 50)
a = a[::-1]
print(a)

testdict = {
  "brand": "apple",
  "ram": "3",
  "year": 2020,
  "year": 2021
}

print(testdict)


testdict = {
  "brand": "Samsung",
  "ram": "3",
  "Os": "Android",
  "year": 2020
}

testdict.update({'brand':'oppo' })
print(testdict)


testdict = {
  "brand": "Samsung",
  "ram": "3",
  "Os": "Android",
  "year": 2020
}

print(testdict.keys())

testdict = {
  "brand": "Samsung",
  "ram": "3",
  "Os": "Android",
  "year": 2020
}

print(testdict.items())

num = int(input("Enter a number: "))
for i in range(1, 11):
    print(f"{num} x {11 - i} = {num * (11 - i)}")

#### functions #####

def average(num1, num2):
    return (num1 + num2) / 2
print(average(5, 10))

def func():  #function definition
    print("This is a function")

func() #function call

def goodDay(name, ending):
    print(f"Good day, {name} {ending}")
    return "great day!"

a = goodDay("Anirban", "thank you!")
print(a)

##### recursion ######

def factorial(n):
    if n == 0:
        return 1
    else:
        return n * factorial(n-1)
    
n = int(input("Enter a number to find its factorial: "))
print(f"The factorial of {n} is {factorial(n)}")

def pattern(n):
    if (n == 0):
        return
    print("*" * n)
    pattern(n-1)

pattern(10)

def inches_to_cm(inches):
    return inches * 2.54

n = float(input("Enter the number of inches: "))
print(f"{n} inches is equal to {inches_to_cm(n)} cm")

def rem(l, word):
    n = []
    for item in l:
        if item != word:
            n.append(item.strip(word))
    return n

l = ["Harry", "Soham", "Shubham", "am"]

print(rem(l, "am"))

def multiples(n):
    for i in range(1, 11):
        print(f"{n} x {i} = {n * i}")

n = int(input("Enter a number to print its multiplication table: "))
multiples(n)

###### file input and output #######

f = open("test.txt")
data = f.read()
print(data)
f.close()

str = "This is a test file.\nIt contains multiple lines of text.\nThis is the end of the file."
f = open("test.txt", "w")
f.write(str)
f.close()

f = open("test.txt", "r")
# data = f.readlines()

line1 = f.readline()
line2 = f.readline()
line3 = f.readline()
print(line1, line2, line3)
f.close()

line = f.readline()
while(line != ""):
    print(line)
    line = f.readline()
f.close()

The same can be achieved using with statement:

with open("test.txt", "r") as f:
    print(f.read())

word = input("Enter a word to search in the poem: ")
words = word.split()
for word in words:
    with open("poem.txt", "r") as f:
        content = f.read()
        if word in content:
            print(f"The word '{word}' is present in the poem.")
        else:
            print(f"The word '{word}' is not present in the poem.")
        
word = input("Enter a word to search in the poem: ")
with open("poem.txt", "r") as f:    
    content = f.read()
    if word in content:
        print(f"The word '{word}' is present in the poem.")
    else:
       print(f"The word '{word}' is not present in the poem")


# Walrus Operator #
if (n := len([1, 2, 3, 4, 5])) > 3:
    print(f"List is too long {n}")