print("Hello World")

username = input("Enter username:")

user_input = raw_input("Enter value:") print("value is: " + user_input)

# Python Program to calculate the square root # Note: change this value for a different result num = 8 # To take the input from the user #num = float(input('Enter a number: ')) num_sqrt = num ** 0.5 print('The square root of %0.3f is %0.3f'%(num ,num_sqrt))

# This program adds two numbers num1 = 1.5 num2 = 6.3 # Add two numbers sum = num1 + num2 # Display the sum print('The sum of {0} and {1} is {2}'.format(num1, num2, sum))

# Python Program to find the area of triangle a = 5 b = 6 c = 7 # Uncomment below to take inputs from the user # a = float(input('Enter first side: ')) # b = float(input('Enter second side: ')) # c = float(input('Enter third side: ')) # calculate the semi-perimeter s = (a + b + c) / 2 # calculate the area area = (s*(s-a)*(s-b)*(s-c)) ** 0.5 print('The area of the triangle is %0.2f' %area)

# Solve the quadratic equation ax**2 + bx + c = 0 # import complex math module import cmath a = 1 b = 5 c = 6 # calculate the discriminant d = (b**2) - (4*a*c) # find two solutions sol1 = (-b-cmath.sqrt(d))/(2*a) sol2 = (-b+cmath.sqrt(d))/(2*a) print('The solution are {0} and {1}'.format(sol1,sol2))

# Python program to swap two variables x = 5 y = 10 # To take inputs from the user #x = input('Enter value of x: ') #y = input('Enter value of y: ') # create a temporary variable and swap the values temp = x x = y y = temp print('The value of x after swapping: {}'.format(x)) print('The value of y after swapping: {}'.format(y))

# Program to generate a random number between 0 and 9 # importing the random module import random print(random.randint(0,9))

# Taking kilometers input from the user kilometers = float(input("Enter value in kilometers: ")) # conversion factor conv_fac = 0.621371 # calculate miles miles = kilometers * conv_fac print('%0.2f kilometers is equal to %0.2f miles' %(kilometers,miles))

# Python Program to convert temperature in celsius to fahrenheit # change this value for a different result celsius = 37.5 # calculate fahrenheit fahrenheit = (celsius * 1.8) + 32 print('%0.1f degree Celsius is equal to %0.1f degree Fahrenheit' %(celsius,fahrenheit))

num = float(input("Enter a number: ")) if num > 0: print("Positive number") elif num == 0: print("Zero") else: print("Negative number")

# Python program to check if the input number is odd or even. # A number is even if division by 2 gives a remainder of 0. # If the remainder is 1, it is an odd number. num = int(input("Enter a number: ")) if (num % 2) == 0: print("{0} is Even".format(num)) else: print("{0} is Odd".format(num))

# Python program to check if year is a leap year or not year = 2000 # To get year (integer input) from the user # year = int(input("Enter a year: ")) # divided by 100 means century year (ending with 00) # century year divided by 400 is leap year if (year % 400 == 0) and (year % 100 == 0): print("{0} is a leap year".format(year)) # not divided by 100 means not a century year # year divided by 4 is a leap year elif (year % 4 ==0) and (year % 100 != 0): print("{0} is a leap year".format(year)) # if not divided by both 400 (century year) and 4 (not century year) # year is not leap year else: print("{0} is not a leap year".format(year))

# Python program to find the largest number among the three input numbers # change the values of num1, num2 and num3 # for a different result num1 = 10 num2 = 14 num3 = 12 # uncomment following lines to take three numbers from user #num1 = float(input("Enter first number: ")) #num2 = float(input("Enter second number: ")) #num3 = float(input("Enter third number: ")) if (num1 >= num2) and (num1 >= num3): largest = num1 elif (num2 >= num1) and (num2 >= num3): largest = num2 else: largest = num3 print("The largest number is", largest)

# Program to check if a number is prime or not num = 29 # To take input from the user #num = int(input("Enter a number: ")) # define a flag variable flag = False if num == 1: print(num, "is not a prime number") elif num > 1: # check for factors for i in range(2, num): if (num % i) == 0: # if factor is found, set flag to True flag = True # break out of loop break # check if flag is True if flag: print(num, "is not a prime number") else: print(num, "is a prime number")

# Python program to display all the prime numbers within an interval lower = 900 upper = 1000 print("Prime numbers between", lower, "and", upper, "are:") for num in range(lower, upper + 1): # all prime numbers are greater than 1 if num > 1: for i in range(2, num): if (num % i) == 0: break else: print(num)

# Python program to find the factorial of a number provided by the user. # change the value for a different result num = 7 # To take input from the user #num = int(input("Enter a number: ")) factorial = 1 # check if the number is negative, positive or zero if num < 0: print("Sorry, factorial does not exist for negative numbers") elif num == 0: print("The factorial of 0 is 1") else: for i in range(1,num + 1): factorial = factorial*i print("The factorial of",num,"is",factorial)

# Multiplication table (from 1 to 10) in Python num = 12 # To take input from the user # num = int(input("Display multiplication table of? ")) # Iterate 10 times from i = 1 to 10 for i in range(1, 11): print(num, 'x', i, '=', num*i)

# Program to display the Fibonacci sequence up to n-th term nterms = int(input("How many terms? ")) # first two terms n1, n2 = 0, 1 count = 0 # check if the number of terms is valid if nterms <= 0: print("Please enter a positive integer") # if there is only one term, return n1 elif nterms == 1: print("Fibonacci sequence upto",nterms,":") print(n1) # generate fibonacci sequence else: print("Fibonacci sequence:") while count < nterms: print(n1) nth = n1 + n2 # update values n1 = n2 n2 = nth count += 1

# Python program to check if the number is an Armstrong number or not # take input from the user num = int(input("Enter a number: ")) # initialize sum sum = 0 # find the sum of the cube of each digit temp = num while temp > 0: digit = temp % 10 sum += digit ** 3 temp //= 10 # display the result if num == sum: print(num,"is an Armstrong number") else: print(num,"is not an Armstrong number")

# Program to check Armstrong numbers in a certain interval lower = 100 upper = 2000 for num in range(lower, upper + 1): # order of number order = len(str(num)) # initialize sum sum = 0 temp = num while temp > 0: digit = temp % 10 sum += digit ** order temp //= 10 if num == sum: print(num)

# Sum of natural numbers up to num num = 16 if num < 0: print("Enter a positive number") else: sum = 0 # use while loop to iterate until zero while(num > 0): sum += num num -= 1 print("The sum is", sum)

# Display the powers of 2 using anonymous function terms = 10 # Uncomment code below to take input from the user # terms = int(input("How many terms? ")) # use anonymous function result = list(map(lambda x: 2 ** x, range(terms))) print("The total terms are:",terms) for i in range(terms): print("2 raised to power",i,"is",result[i])

# Display the powers of 2 using anonymous function terms = 10 # Uncomment code below to take input from the user # terms = int(input("How many terms? ")) # use anonymous function result = list(map(lambda x: 2 ** x, range(terms))) print("The total terms are:",terms) for i in range(terms): print("2 raised to power",i,"is",result[i])

# Take a list of numbers my_list = [12, 65, 54, 39, 102, 339, 221,] # use anonymous function to filter result = list(filter(lambda x: (x % 13 == 0), my_list)) # display the result print("Numbers divisible by 13 are",result)

# Python program to convert decimal into other number systems dec = 344 print("The decimal value of", dec, "is:") print(bin(dec), "in binary.") print(oct(dec), "in octal.") print(hex(dec), "in hexadecimal.")

# Program to find the ASCII value of the given character c = 'p' print("The ASCII value of '" + c + "' is", ord(c))

# Python program to find H.C.F of two numbers # define a function def compute_hcf(x, y): # choose the smaller number if x > y: smaller = y else: smaller = x for i in range(1, smaller+1): if((x % i == 0) and (y % i == 0)): hcf = i return hcf num1 = 54 num2 = 24 print("The H.C.F. is", compute_hcf(num1, num2))

# Python Program to find the L.C.M. of two input number def compute_lcm(x, y): # choose the greater number if x > y: greater = x else: greater = y while(True): if((greater % x == 0) and (greater % y == 0)): lcm = greater break greater += 1 return lcm num1 = 54 num2 = 24 print("The L.C.M. is", compute_lcm(num1, num2))

# Python Program to find the factors of a number # This function computes the factor of the argument passed def print_factors(x): print("The factors of",x,"are:") for i in range(1, x + 1): if x % i == 0: print(i) num = 320 print_factors(num)

# This function adds two numbers def add(x, y): return x + y # This function subtracts two numbers def subtract(x, y): return x - y # This function multiplies two numbers def multiply(x, y): return x * y # This function divides two numbers def divide(x, y): return x / y print("Select operation.") print("1.Add") print("2.Subtract") print("3.Multiply") print("4.Divide") while True: # take input from the user choice = input("Enter choice(1/2/3/4): ") # check if choice is one of the four options if choice in ('1', '2', '3', '4'): try: num1 = float(input("Enter first number: ")) num2 = float(input("Enter second number: ")) except ValueError: print("Invalid input. Please enter a number.") continue if choice == '1': print(num1, "+", num2, "=", add(num1, num2)) elif choice == '2': print(num1, "-", num2, "=", subtract(num1, num2)) elif choice == '3': print(num1, "*", num2, "=", multiply(num1, num2)) elif choice == '4': print(num1, "/", num2, "=", divide(num1, num2)) # check if user wants another calculation # break the while loop if answer is no next_calculation = input("Let's do next calculation? (yes/no): ") if next_calculation == "no": break else: print("Invalid Input")

# Python program to shuffle a deck of card # importing modules import itertools, random # make a deck of cards deck = list(itertools.product(range(1,14),['Spade','Heart','Diamond','Club'])) # shuffle the cards random.shuffle(deck) # draw five cards print("You got:") for i in range(5): print(deck[i][0], "of", deck[i][1])

# Program to display calendar of the given month and year # importing calendar module import calendar yy = 2014 # year mm = 11 # month # To take month and year input from the user # yy = int(input("Enter year: ")) # mm = int(input("Enter month: ")) # display the calendar print(calendar.month(yy, mm))

# Python program to find the sum of natural using recursive function def recur_sum(n): if n <= 1: return n else: return n + recur_sum(n-1) # change this value for a different result num = 16 if num < 0: print("Enter a positive number") else: print("The sum is",recur_sum(num))

# Factorial of a number using recursion def recur_factorial(n): if n == 1: return n else: return n*recur_factorial(n-1) num = 7 # check if the number is negative if num < 0: print("Sorry, factorial does not exist for negative numbers") elif num == 0: print("The factorial of 0 is 1") else: print("The factorial of", num, "is", recur_factorial(num))

# Function to print binary number using recursion def convertToBinary(n): if n > 1: convertToBinary(n//2) print(n % 2,end = '') # decimal number dec = 34 convertToBinary(dec) print()

# Program to add two matrices using nested loop X = [[12,7,3], [4 ,5,6], [7 ,8,9]] Y = [[5,8,1], [6,7,3], [4,5,9]] result = [[0,0,0], [0,0,0], [0,0,0]] # iterate through rows for i in range(len(X)): # iterate through columns for j in range(len(X[0])): result[i][j] = X[i][j] + Y[i][j] for r in result: print(r)

# Program to transpose a matrix using a nested loop X = [[12,7], [4 ,5], [3 ,8]] result = [[0,0,0], [0,0,0]] # iterate through rows for i in range(len(X)): # iterate through columns for j in range(len(X[0])): result[j][i] = X[i][j] for r in result: print(r)

# Program to multiply two matrices using nested loops # 3x3 matrix X = [[12,7,3], [4 ,5,6], [7 ,8,9]] # 3x4 matrix Y = [[5,8,1,2], [6,7,3,0], [4,5,9,1]] # result is 3x4 result = [[0,0,0,0], [0,0,0,0], [0,0,0,0]] # iterate through rows of X for i in range(len(X)): # iterate through columns of Y for j in range(len(Y[0])): # iterate through rows of Y for k in range(len(Y)): result[i][j] += X[i][k] * Y[k][j] for r in result: print(r)

# Program to check if a string is palindrome or not my_str = 'aIbohPhoBiA' # make it suitable for caseless comparison my_str = my_str.casefold() # reverse the string rev_str = reversed(my_str) # check if the string is equal to its reverse if list(my_str) == list(rev_str): print("The string is a palindrome.") else: print("The string is not a palindrome.")

# define punctuation punctuations = '''!()-[]{};:'"\,<>./?@#$%^&*_~''' my_str = "Hello!!!, he said ---and went." # To take input from the user # my_str = input("Enter a string: ") # remove punctuation from the string no_punct = "" for char in my_str: if char not in punctuations: no_punct = no_punct + char # display the unpunctuated string print(no_punct)

# Program to sort alphabetically the words form a string provided by the user my_str = "Hello this Is an Example With cased letters" # To take input from the user #my_str = input("Enter a string: ") # breakdown the string into a list of words words = [word.lower() for word in my_str.split()] # sort the list words.sort() # display the sorted words print("The sorted words are:") for word in words: print(word)

# Program to perform different set operations like in mathematics # define three sets E = {0, 2, 4, 6, 8}; N = {1, 2, 3, 4, 5}; # set union print("Union of E and N is",E | N) # set intersection print("Intersection of E and N is",E & N) # set difference print("Difference of E and N is",E - N) # set symmetric difference print("Symmetric difference of E and N is",E ^ N)

# Program to count the number of each vowels # string of vowels vowels = 'aeiou' ip_str = 'Hello, have you tried our tutorial section yet?' # make it suitable for caseless comparisions ip_str = ip_str.casefold() # make a dictionary with each vowel a key and value 0 count = {}.fromkeys(vowels,0) # count the vowels for char in ip_str: if char in count: count[char] += 1 print(count)

# Python program to mail merger # Names are in the file names.txt # Body of the mail is in body.txt # open names.txt for reading with open("names.txt", 'r', encoding='utf-8') as names_file: # open body.txt for reading with open("body.txt", 'r', encoding='utf-8') as body_file: # read entire content of the body body = body_file.read() # iterate over names for name in names_file: mail = "Hello " + name.strip() + "\n" + body # write the mails to individual files with open(name.strip()+".txt", 'w', encoding='utf-8') as mail_file: mail_file.write(mail)

def jpeg_res(filename): """"This function prints the resolution of the jpeg image file passed into it""" # open image for reading in binary mode with open(filename,'rb') as img_file: # height of image (in 2 bytes) is at 164th position img_file.seek(163) # read the 2 bytes a = img_file.read(2) # calculate height height = (a[0] << 8) + a[1] # next 2 bytes is width a = img_file.read(2) # calculate width width = (a[0] << 8) + a[1] print("The resolution of the image is",width,"x",height) jpeg_res("img1.jpg")

# Python program to find the SHA-1 message digest of a file # importing the hashlib module import hashlib def hash_file(filename): """"This function returns the SHA-1 hash of the file passed into it""" # make a hash object h = hashlib.sha1() # open file for reading in binary mode with open(filename,'rb') as file: # loop till the end of the file chunk = 0 while chunk != b'': # read only 1024 bytes at a time chunk = file.read(1024) h.update(chunk) # return the hex representation of digest return h.hexdigest() message = hash_file("track1.mp3") print(message)

#nested dictionary from pathlib import Path Path("/root/dirA/dirB").mkdir(parents=True, exist_ok=True)

#Python Program to Access Index of a List Using for Loop my_list = [21, 44, 35, 11] for index, val in enumerate(my_list): print(index, val)

Python Program to Flatten a Nested List my_list = [[1], [2, 3], [4, 5, 6, 7]] flat_list = [num for sublist in my_list for num in sublist] print(flat_list)

Python Program to Slice Lists my_list = [1, 2, 3, 4, 5] print(my_list[2:])

Python Program to Iterate Over Dictionaries Using for Loop dt = {'a': 'juice', 'b': 'grill', 'c': 'corn'} for key, value in dt.items(): print(key, value)

Python Program to Sort a Dictionary by Value dt = {5:4, 1:6, 6:3} sorted_dt = {key: value for key, value in sorted(dt.items(), key=lambda item: item[1])} print(sorted_dt)

Python Program to Check If a List is Empty my_list = [] if not my_list: print("the list is empty")

Python Program to Catch Multiple Exceptions in One Line string = input() try: num = int(input()) print(string+num) except (TypeError, ValueError) as e: print(e)

Python Program to Copy a File from shutil import copyfile copyfile("/root/a.txt", "/root/b.txt")

Python Program to Concatenate Two Lists list_1 = [1, 'a'] list_2 = [3, 4, 5] list_joined = list_1 + list_2 print(list_joined)

Python Program to Check if a Key is Already Present in a Dictionary my_dict = {1: 'a', 2: 'b', 3: 'c'} if 2 in my_dict: print("present")

Python Program to Split a List Into Evenly Sized Chunks def split(list_a, chunk_size): for i in range(0, len(list_a), chunk_size): yield list_a[i:i + chunk_size] chunk_size = 2 my_list = [1,2,3,4,5,6,7,8,9] print(list(split(my_list, chunk_size)))

Python Program to Parse a String to a Float or Int balance_str = "1500" balance_int = int(balance_str) # print the type print(type(balance_int)) # print the value print(balance_int)