LAB WORK

Aim: Write a program to demonstrate basic data type in python. 

import sys

a = int(sys.argv[1])

b = int(sys.argv[2])

c = a + b

print("Sum=", c)

# Output:

# python add.py 4 5

# Sum= 9Code:

a = 5

print("Type of a: ", type(a))

b = 5.0

print("\nType of b: ", type(b))

c = 2 + 4j

print("\nType of c: ", type(c))

# Creating a String

String1 = "Welcome to the Geeks World"

print("String with the use of Single Quotes: ")

print(String1)

# Creating a List with

List = ["Geeks", "For", "Geeks"]

print("\nList containing multiple values: ")

print(List[0])

print(List[2])

# Creating a Tuple with the use of list

list1 = [1, 2, 4, 5, 6]

print("\nTuple using List: ")

print(tuple(list1))

# Creating a Set

set1 = set()

set1.add(8)

set1.add(9)

set1.add((6, 7))

print("\nSet after Addition of Three elements: ")

print(set1)

# Output:

# Type of a:  <class 'int'>

# Type of b:  <class 'float'>

# Type of c:  <class 'complex'>

# String with the use of Single Quotes:

# Welcome to the Geeks World

# 17

# List containing multiple values:

# Geeks

# Geeks

# Tuple using List:

# (1, 2, 4, 5, 6)

# Set after Addition of Three elements:

# {8, 9, (6, 7)}

Aim: (a) Write a program to compute distance between two points taking input from the user.

# Code:

import math

a = int(input("Enter first value"))

b = int(input("Enter second value"))

c = math.sqrt(a**2 + b**2)

print("Distance=", c)

# Output:

# Enter first value :- 5

#Enter second value :- 6 

#Distance= 7.810249675906654 

Aim: (b) Write a program add.py that takes 2 numbers as command line arguments and prints its sum. 

import sys

a = int(sys.argv[1])

b = int(sys.argv[2])

c = a + b

print("Sum=", c)

# Output:

# python add.py 4 5

# Sum= 9

Aim: (a) Write a Program for checking whether the given number is an even number or not. 

# Code:

num = int(input("Enter a number: "))

if num % 2 == 0:

    print("This is an even number.")

else:

    print("This is an odd number.")

# Output:

# Enter a number: 4

# This is an even number.

Aim: (b) Using a for loop, write a program that prints out the decimal equivalents of 1/2, 1/3, 1/4, . . . , 1/10. 

# Code:

for i in range(1, 11):

    print("Decimal equivalent value for 1/", i, " is", 1 / float(i))

# Output:

# Decimal equivalent value for 1/ 1  is 1.0

# Decimal equivalent value for 1/ 2  is 0.5

# Decimal equivalent value for 1/ 3  is 0.3333333333333333

# Decimal equivalent value for 1/ 4  is 0.25

# Decimal equivalent value for 1/ 5  is 0.2

# Decimal equivalent value for 1/ 6  is 0.16666666666666666

# Decimal equivalent value for 1/ 7  is 0.14285714285714285

# Decimal equivalent value for 1/ 8  is 0.125

# Decimal equivalent value for 1/ 9  is 0.1111111111111111

# Decimal equivalent value for 1/ 10  is 0.1

Aim: (a) Write a Program to demonstrate list in python (We are given an array of n distinct numbers, the task is to sort all even-placed numbers in increasing and odd-place numbers in decreasing order. The modified array should contain all sorted even-placed numbers followed by reverse sorted odd-placed numbers.) 

# Code:

def evenOddSort(input):

    # separate even odd indexed elements list

    evens = [input[i] for i in range(0, len(input)) if i % 2 == 0]

    odds = [input[i] for i in range(0, len(input)) if i % 2 != 0]

    # sort evens in ascending and odds in descending using sorted() method

    print(sorted(evens) + sorted(odds, reverse=True))

input = [0, 1, 2, 3, 4, 5, 6, 7]

evenOddSort(input)

# Output:

# [0, 2, 4, 6, 7, 5, 3, 1]

Aim: (b) Write a Program to demonstrate tuple in python (Given a list of tuples, Write a Python program to remove all the duplicated tuples from the given list). 

def removeDuplicates(lst):

    return [t for t in (set(tuple(i) for i in lst))]

# Driver code

lst = [(1, 2), (5, 7), (3, 6), (1, 2)]

print(removeDuplicates(lst))

# Output:

# [(1, 2), (5, 7), (3, 6)]

Aim: (c) Write a program using a for loop that loops over a sequence. 

players = ["kohli", "dhoni", "sachin", "sehwag", "Dravid"]

for i in players:

    print(i)

# Output:

# kohli

# dhoni

# sachin

# sehwag

# Dravid

Aim: (d) Write a program using a while loop that asks the user for a number, and prints a countdown from that number to zero. 

# Code:

n = int(input("Enter the number for countdown: "))

while 0 <= n:

    print(n, end=" ")

    n = n - 1

# Output:

# Enter the number for countdown: 15

# 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

Aim: (a) Find the sum of all the primes below two million. 

# Code:

n = 2000000

prime = [True for i in range(n + 1)]

p = 2

while p * p <= n:

    if prime[p] == True:

        for i in range(p * p, n + 1, p):

            prime[i] = False

    p += 1

sum = 0

for p in range(2, n):

    if prime[p]:

        sum = sum + p

print("sum=", sum)

# Output:

# sum= 142913828922

Aim: (b) By considering the terms in the Fibonacci sequence whose values do not exceed four million, WAP to find the sum of the even-valued terms. 

# Code:

limit = 4000000

if limit < 2:

    print("Sum=0")

else:

    ef1 = 0

    ef2 = 2

    sm = ef1 + ef2

    while ef2 <= limit:

        ef3 = 4 * ef2 + ef1

        if ef3 > limit:

            break

        ef1 = ef2

        ef2 = ef3

        sm = sm + ef2

    print("Sum=", sm)

# Output: Sum= 4613732

Aim: (a) Write a program to count the numbers of characters in the string and store them in a dictionary data structure. 

def char_frequency(str1):

    dict = {}

    for n in str1:

        keys = dict.keys()

        if n in keys:

            dict[n] += 1

        else:

            dict[n] = 1

    return dict

 print(char_frequency("google.com"))

 print(char_frequency("https://aayushkimehnat.vercel.app"))

#Output:

#{'g': 2, 'o': 3, 'l': 1, 'e': 1, '.': 1, 'c': 1, 'm': 1}

#{'a': 4, 'y': 1, 'u': 1, 's': 1, 'h': 2, 'k': 1, 'i': 1, 'm': 1, 'e': 3, 'n': 1, 't': 1, '.': 2, 'v': 1, 'r': 1, 'c': 1, 'l': 1, 'p': 2}

Aim: (b) Write a program to use split and join methods in the string and trace a birthday of a person with a dictionary data structure. 

dob = {"mothi": "12-11-1990", "sudheer": "17-08-1991", "vinay": "31-08-1988"}

str1 = input("which person dob you want:")

l = str1.split()

birth = ""

for i in l:

    if i in dob.keys():

        name = i

print(" ".join([name, "Birthday is", dob[name]]))

Output:- 

#which person dob you want:- mothi

#mothi Birthday is 12-11-1990

Aim: Write a program to count frequency of characters in a given file. Can you use character frequency to tell whether the given file is a Python program file, C program file or a text file? 

# Code:

import os

f = open("deepa.py")

count = dict()

for line in f:

    for ch in line:

        if ch in count:

            count[ch] = count[ch] + 1

        else:

            count[ch] = 1

print(count)

filename, file_extension = os.path.splitext("deepa.py")

print("file_extension==", file_extension)

if file_extension == ".py":

    print("its python program file")

elif file_extension == ".txt":

    print("its a txt file")

elif file_extension == ".c":

    print("its a c program file")

f.close()

# deepa.py:

# my name is deepa modi

# Output:

# {'m': 3, 'y': 1, ' ': 4, 'n': 1, 'a': 2, 'e': 3, 'i': 2, 's': 1, 'd': 2, 'p': 1, 'o': 1}

# file_extension== .py

# its python program file

def student_management():

    students = {}

    student_marks = {}

    courses = set()

    def add_student(roll_no, student_name):

        if roll_no not in students:

            students[roll_no] = student_name

        else:

            print(f"Roll number {roll_no} already exists.")

    def add_marks(roll_no, subject, marks):

        if roll_no in students:

            if roll_no in student_marks:

                student_marks[roll_no][subject] = marks

            else:

                student_marks[roll_no] = {subject: marks}

            courses.add(subject)

        else:

            print(f"Student with roll number {roll_no} not found.")

    def get_student_details(roll_no):

        if roll_no in students:

            student_name = students[roll_no]

            print(f"Roll Number: {roll_no}")

            print(f"Student: {student_name}")

            if roll_no in student_marks:

                print("Marks:")

                for subject, marks in student_marks[roll_no].items():

                    print(f"  {subject}: {marks}")

            else:

                print("No marks recorded for this student.")

        else:

            print(f"Student with roll number {roll_no} not found.")

    def get_unique_courses():

        return courses

    add_student(101, "Aman")

    add_student(102, "Shivam")

    add_student(103, "Pravesh")

    add_student(101, "Aman")

    add_marks(101, "Mad_lab", 90)

    add_marks(101, "Python_Lab", 85)

    add_marks(102, "Mad_lab", 75)

    add_marks(102, "Python_Lab", 80)

    add_marks(103, "Mad_lab", 92)

    add_marks(103, "Python_Lab", 88)

    add_marks(104, "Mad_lab", 90)

    get_student_details(102)

    print("\nUnique Courses:", get_unique_courses())

student_management()