- Python
class Library(object):
books = []
def __init__(self, name, author, isbn, price):
self.name = name
self.author = author
self.isbn = isbn
self.price = price
def addBook(self):
Library.books.append((self.name, self.author, self.isbn, self.price))
def searchBookisbn(self, isbn):
for book in Library.books:
if book[2] == isbn:
return book
return None # Return None if the book with the given ISBN is not found
def searchBookAuthor(self, author):
author_books = []
for book in Library.books:
if book[1] == author:
author_books.append(book)
return author_books
def searchUnderPrice(self, price):
price_books = []
for book in Library.books:
if book[3] == price:
price_books.append(book)
return price_books
# Create instances of the Library class
library = Library('Great Expectations', 'Charles Dick', 'ID0234', 300)
library.addBook()
library = Library('War and Peace', 'Leo Tolstoy', 'ID278', 250)
library.addBook()
library = Library('Middlemarch', 'George Eliot', 'ID345', 400)
library.addBook()
# Create a new instance for searching
search_instance = Library('', '', '', '')
print(search_instance.searchBookisbn('ID278'))
print(search_instance.searchBookAuthor('George Eliot'))
print(search_instance.searchUnderPrice(400))
- Python
class Hello:
def func1(self, name):
print(f"Hello, {name}")
return name
# Create an instance of the Hello class
b = Hello()
# Get input from the user
x = input("Enter the name: ")
# Call the func1 method and capture the returned value
result = b.func1(x)
# Print the returned value
print(f"Returned value: {result}")
- Python
class Samp:
def __init__(self, name, age, emp_id, salary): # Changed "id" to "emp_id" for clarity
self.name = name
self.age = age
self.emp_id = emp_id # Changed to "emp_id" for clarity
self.salary = salary
# Create instances of the Samp class
emp1 = Samp('faker', 24, 'id33', 25000)
emp2 = Samp('joker', 25, 'id32', 30000)
# Print the dictionary representation of each instance
print(emp1.__dict__)
print(emp2.__dict__)
# Access individual attributes
print(emp1.name)
print(emp2.age)
# Note: "__init__" is not something you usually access directly.
# Instead, it's called automatically when you create an instance.
# If you want to check the type of the constructor, use the type() function.
print(type(emp1.__init__))
- Python
class ComplexNo:
def __init__(self, r=0, i=0):
self.real = r
self.imag = i
def get(self):
print("{0}+{1}j".format(self.real, self.imag))
# Get input from the user
x = float(input("Enter a real no: "))
y = float(input("Enter an imaginary no: "))
# Create instances of the ComplexNo class
c1 = ComplexNo(x, y)
c1.get()
c2 = ComplexNo(y)
c2.var = 10 # Add var as an attribute to c2 instance
# Access and print attributes
print((c2.real, c2.imag, getattr(c2, 'var', None))) # Use getattr to avoid AttributeError
print(c2.var if hasattr(c2, 'var') else None) # Check if 'var' exists before accessingProblem Statement: How to create a digital speedometer and record data of a vehicle's accelertion and braking speed?
- Python
class Car:
def __init__(self, year, mph, speed):
self.year = year
self.mph = mph
self.speed = speed
def accelerate(self, speed_increase):
for i in range(self.speed, self.speed + speed_increase + 1, 10):
print("Accelerating speed:", i)
self.speed += speed_increase
def brake(self, speed_decrease):
for x in range(self.speed, max(self.speed - speed_decrease - 1, 0), -20):
print("Braking speed:", x)
self.speed = max(self.speed - speed_decrease, 0)
# Create an instance of the Car class
c1 = Car(2014, 58, 60)
# Access and print attributes
print('Year:', c1.year)
print('MPH:', c1.mph)
print('Speed:', c1.speed)
# Accelerate and brake
c1.accelerate(10)
c1.brake(120)
- Python
class Company:
def __init__(self, name, turn, rev, eno):
self.name = name
self.turn = turn
self.rev = rev
self.eno = eno
def revenue(self):
i = self.rev / self.eno
print('\nRevenue per employee is:', i)
# Get input from the user
name_input = input("NAME: ")
turnover_input = int(input("TURN-OVER: "))
revenue_input = int(input("REVENUE: "))
employees_input = int(input("NO: OF EMPLOYEES: "))
# Create an instance of the Company class
company_instance = Company(name_input, turnover_input, revenue_input, employees_input)
# Call the revenue method
company_instance.revenue()
- Python
def change(var, lst): # Avoid using 'list' as a variable name, as it's a built-in type
var = 1
lst[3] = 40
k = 4
a = [1, 2, 3, 4]
print("Original list:", a)
change(k, a)
print("Modified list:", a)
- Python
class Rect:
def __init__(self, length, width):
self.length = length
self.width = width
def cal(self):
return self.length * self.width
def cal1(self):
return 2 * (self.length + self.width)
# Create an instance of the Rect class
c = Rect(3, 4)
# Calculate and print the area and perimeter
print('Area of the Rectangle:', c.cal())
print('Perimeter of the Rectangle:', c.cal1())
- Python
class Samp:
def __init__(self):
self.smp = self.read()
def read(self):
lst = []
try:
for i in range(1, 6):
lst.append(int(input('Enter an integer: ')))
except ValueError:
print('Input contains a non-integer! Run again.')
print("List of 5 integers:", lst)
return lst
# Create an instance of the Samp class
s = Samp()
- Python
i = [1, 2, 3]
j = [4, 5, 6]
k = len(i)
print("Length of i:", k)
print("Original list i:", i)
# Remove the element '1' from the list
i.remove(1)
print("List i after removing element '1':", i)
# Remove the element at index 0 from the list
i.pop(0)
print("List i after popping element at index 0:", i)
# Append a new element to the list
i.append(7)
print("List i after appending '7':", i)
- Python
class Looping:
def print_numbers(self):
for i in range(1, 11):
print(i, "", i + 10, "", i * 100, '', i * 1000)
# Create an instance of the Looping class
l = Looping()
# Call the print_numbers method
l.print_numbers()
- Python
import os
# Use double backslashes or a raw string for the path
os.chdir('C:\\python')
# Open a file for writing and reading
a = open('sam1.txt', 'w+')
# Write to the file
for i in range(10):
a.write("This is a new txt file %d\n\r" % (i + 1))
# Close the file
a.close()
# Open the file for reading
a = open('sam1.txt', 'r')
# Read and print the contents
x = a.read()
print(x)
# Close the file
a.close()
- Python
import csv
import os
# Set the working directory
os.chdir('C:\\pyf')
# Open the CSV file for reading
with open('sample1.csv', 'r') as file:
# Create a CSV reader
reader = csv.reader(file)
# Iterate over each row in the CSV file
for row in reader:
print(row)
- Python
import csv
import os
# Set the working directory
os.chdir('C:\\pyf')
with open('sample1.csv', 'r') as f:
r = csv.reader(f)
with open('hello.csv', 'w', newline='') as new:
w = csv.writer(new, delimiter='-')
for line in r:
w.writerow(line)Problem Statement: Write a program which will find all such numbers which are divisible by 7 but are not a multiple of 5.
The numbers obtained should be printed in a comma-separated sequence on a single line.
- Python
l = []
for i in range(10, 100):
if (i % 7 == 0) and (i % 5 != 0):
l.append(str(i))
result = ', '.join(l) + '.'
print(result)Problem Statement: Write a program which can compute the factorial of a given numbers. The results should be printed in a comma-separated sequence on a single line. Suppose the following input is supplied to the program: 8 Then, the output should be: 40320.
Hints: In case of input data being supplied to the question, it should be assumed to be a console input.
- Python
def fact(x):
if x < 0:
return "Factorial is not defined for negative numbers."
elif x == 0:
return 1
else:
return x * fact(x - 1)
try:
x = int(input("Enter a non-negative integer: "))
print(f"The factorial of {x} is: {fact(x)}")
except ValueError:
print("Invalid input. Please enter a non-negative integer.")Problem Statement: With a given integral number n, write a program to generate a dictionary that contains (i, i*i) such that is an integral number between 1 and n (both included). and then the program should print the dictionary. Suppose the following input is supplied to the program: 8 Then, the output should be: {1: 1, 2: 4, 3: 9, 4: 16, 5: 25, 6: 36, 7: 49, 8: 64} .
Hints: In case of input data being supplied to the question, it should be assumed to be a console input. Consider use dict()
- Python
try:
n = int(input('Enter a non-negative integer: '))
if n < 0:
print("Please enter a non-negative integer.")
else:
d = {i: i*i for i in range(1, n+1)}
print(d)
except ValueError:
print("Invalid input. Please enter a non-negative integer.")Problem Statement: Write a program which accepts a sequence of comma-separated numbers from console and generate a list and a tuple which contains every number. Suppose the following input is supplied to the program: 34,67,55,33,12,98 Then, the output should be: ['34', '67', '55', '33', '12', '98'] ('34', '67', '55', '33', '12', '98') .
Hints: In case of input data being supplied to the question, it should be assumed to be a console input. tuple() method can convert list to tuple
- Python
values = input("Enter comma-separated values: ")
l = [value.strip() for value in values.split(",")]
t = tuple(l)
print("List:", l)
print("Tuple:", t)Problem Statement: Define a class which has at least two methods: getString: to get a string from console input printString: to print the string in upper case. Also please include simple test function to test the class methods.
- Python
class InputOutString(object):
def __init__(self, input_string=""):
self.s = input_string
def printString(self):
print(self.s.upper())
# Get input string from the user
user_input = input('Enter a string: ')
# Create an instance of the class with the user input
strObj = InputOutString(user_input)
# Print the string in uppercase
strObj.printString()Problem Statement: Write a program that calculates and prints the value according to the given formula: Q = Square root of [(2 * C * D)/H] Following are the fixed values of C and H: C is 50. H is 30. D is the variable whose values should be input to your program in a comma-separated sequence. Example Let us assume the following comma separated input sequence is given to the program: 100,150,180 The output of the program should be: 18,22,24 .
Hints: If the output received is in decimal form, it should be rounded off to its nearest value (for example, if the output received is 26.0, it should be printed as 26) In case of input data being supplied to the question, it should be assumed to be a console input.
- Python
import math
# Take input for c and h
c = float(input("Enter value for c: "))
h = float(input("Enter value for h: "))
# Take a comma-separated list of values
items = [float(x) for x in input("Enter comma-separated values: ").split(',')]
# Calculate the rounded square root for each value
values = [str(int(round(math.sqrt(2 * c * d / h)))) for d in items]
# Print the result
print(','.join(values))Problem Statement: Write a program which takes 2 digits, X,Y as input and generates a 2-dimensional array. The element value in the i-th row and j-th column of the array should be i*j. Note: i=0,1.., X-1; j=0,1,¡Y-1. Example Suppose the following inputs are given to the program: 3,5 Then, the output of the program should be: [[0, 0, 0, 0, 0], [0, 1, 2, 3, 4], [0, 2, 4, 6, 8]] .
Hints: In case of input data being supplied to the question, it should be assumed to be a console input in a comma-separated form.
- Python
input_str = "3,5" # Using a string for input
dimensions = [int(x) for x in input_str.split(',')]
row_num = dimensions[0]
col_num = dimensions[1]
multilist = [[0 for col in range(col_num)] for row in range(row_num)]
for row in range(row_num):
for col in range(col_num):
multilist[row][col] = row * col
print(multilist)Problem Statement: Write a program that accepts a comma separated sequence of words as input and prints the words in a comma-separated sequence after sorting them alphabetically. Suppose the following input is supplied to the program: without,hello,bag,world Then, the output should be: bag,hello,without,world.
Hints: In case of input data being supplied to the question, it should be assumed to be a console input.
- Python
items = input("Enter comma-separated items: ").split(',')
items.sort()
print(','.join(items))Problem Statement: Write a program that accepts sequence of lines as input and prints the lines after making all characters in the sentence capitalized. Suppose the following input is supplied to the program: Hello world Practice makes perfect Then, the output should be: HELLO WORLD PRACTICE MAKES PERFECT.
Hints: In case of input data being supplied to the question, it should be assumed to be a console input.
- Python
lines = []
while True:
s = input(">>> ")
if not s:
break
lines.append(s.upper())
for sentence in lines:
print(sentence)Problem Statement: Write a program that accepts a sequence of whitespace separated words as input and prints the words after removing all duplicate words and sorting them alphanumerically. Suppose the following input is supplied to the program: hello world and practice makes perfect and hello world again Then, the output should be: again and hello makes perfect practice world.
Hints: In case of input data being supplied to the question, it should be assumed to be a console input. We use set container to remove duplicated data automatically and then use sorted() to sort the data.
- Python
s = input('>>>')
unique_sorted_words = ' '.join(sorted(set(s.split())))
print(unique_sorted_words)Problem Statement: Write a program which accepts a sequence of comma separated 4 digit binary numbers as its input and then check whether they are divisible by 5 or not. The numbers that are divisible by 5 are to be printed in a comma separated sequence. Example: 0100,0011,1010,1001 Then the output should be: 1010 Notes: Assume the data is input by console.
Hints: In case of input data being supplied to the question, it should be assumed to be a console input.
- Python
binary_input = input('>>>')
binary_numbers = [x for x in binary_input.split(',') if int(x, 2) % 5 == 0]
print(','.join(binary_numbers))Problem Statement: Write a program that computes the value of a+aa+aaa+aaaa with a given digit as the value of a. Suppose the following input is supplied to the program: 9 Then, the output should be: 11106.
Hints: In case of input data being supplied to the question, it should be assumed to be a console input.
- Python
a = input()
n1 = int( "%s" % a )
n2 = int( "%s%s" % (a,a) )
n3 = int( "%s%s%s" % (a,a,a) )
n4 = int( "%s%s%s%s" % (a,a,a,a) )
print(n1+n2+n3+n4)
#(or)
a = input()
total_sum = 0
for i in range(1, 5):
total_sum += int(str(a) * i)
print(total_sum)Problem Statement: Use a list comprehension to square each odd number in a list. The list is input by a sequence of comma-separated numbers. Suppose the following input is supplied to the program: 1,2,3,4,5,6,7,8,9 Then, the output should be: 1,3,5,7,9.
Hints: In case of input data being supplied to the question, it should be assumed to be a console input.
- Python
try:
values = input("Enter comma-separated numbers: ")
numbers = [x for x in values.split(",") if int(x) % 2 != 0]
print(",".join(numbers))
except ValueError:
print("Invalid input. Please enter integer values.")Problem Statement: Write a program that computes the net amount of a bank account based a transaction log from console input. The transaction log format is shown as following: D 100 W 200 D means deposit while W means withdrawal. Suppose the following input is supplied to the program: D 300 D 300 W 200 D 100 Then, the output should be: 500 .
Hints: In case of input data being supplied to the question, it should be assumed to be a console input.
- Python
netAmount = 0
while True:
s = input("Enter transaction (D/W amount) or press Enter to finish: ")
if not s:
break
values = s.split(" ")
if len(values) == 2:
operation = values[0]
try:
amount = int(values[1])
if operation == "D":
netAmount += amount
elif operation == "W":
netAmount -= amount
else:
print("Invalid operation. Please enter 'D' or 'W'.")
except ValueError:
print("Invalid amount. Please enter a valid integer.")
else:
print("Invalid input. Please enter a valid transaction.")
print("Net Amount:", netAmount)Problem Statement: A website requires the users to input username and password to register. Write a program to check the validity of password input by users. Following are the criteria for checking the password:
Maximum length of transaction password: 12 Your program should accept a sequence of comma separated passwords and will check them according to the above criteria. Passwords that match the criteria are to be printed, each separated by a comma. Example If the following passwords are given as input to the program: ABd1234@1,a F1#,2w3E*,2We3345 Then, the output of the program should be: ABd1234@1.
Hints: In case of input data being supplied to the question, it should be assumed to be a console input.
- Python
import re
value = []
items=[x for x in input('>>>').split(',')]
for p in items:
if len(p)<=6 or len(p)>12:
continue
else:
pass
if not re.search("[a-z]",p):
continue
elif not re.search("[0-9]",p):
continue
elif not re.search("[A-Z]",p):
continue
elif not re.search("[$#@]",p):
continue
elif re.search("\s",p):
continue
else:
pass
value.append(p)
print(",".join(value))
#(or)
import re
def is_valid_password(password):
if 6 <= len(password) <= 12 and re.match("^[a-zA-Z0-9$#@]+$", password) and any(c.islower() for c in password) and any(c.isdigit() for c in password) and any(c.isupper() for c in password) and any(c in '$#@' for c in password):
return True
return False
items = [x for x in input('Enter passwords separated by commas: ').split(',')]
valid_passwords = [p for p in items if is_valid_password(p)]
print("Valid passwords:", ",".join(valid_passwords))Problem Statement: Write a program that computes the Normal Distribution of inputs and plot the data using seaborn module.
Hints: In case of input data being supplied to the question, it should be assumed to be a console input.
- Python
import numpy as np
from scipy.stats import norm
import seaborn as sns
# Example 1
print(sum(range(4), -1)) # Output: 6
# Example 2
# Generate random samples from a normal distribution
data_normal = norm.rvs(size=10000, loc=0, scale=1)
# Create a histogram with KDE using seaborn
ax = sns.distplot(data_normal, bins=100, kde=True, color='skyblue',
hist_kws={"linewidth": 15, 'alpha': 1})
ax.set(xlabel='Normal Distribution', ylabel='Frequency')- Fork the Repo and use spyder IDE (or) Replit for training.
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