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Write a Python program to create a sequence where the first four members of the sequence are equal to one, and each successive term of the sequence is equal to the sum of the four previous ones. Find the Nth member of the sequence.

Write a Python program to create a sequence where the first four members of the sequence are equal to one, and each successive term of the sequence is equal to the sum of the four previous ones. Find the Nth member of the sequence.

Example

Test.py 
			
# Code :

def new_seq(n):
if n==1 or n==2 or n==3 or n==4:
return 1
return new_seq(n-1) + new_seq(n-2) + new_seq(n-3) + new_seq(n-4)
print(new_seq(5))
print(new_seq(6))
print(new_seq(7))

Write a Python program to add two positive integers without using the '+' operator.

Write a Python program to add two positive integers without using the '+' operator.

Example

Test.py 
						

# Note: Use bitwise operations to add two numbers.

# Code :

def add_without_plus_operator(a, b):
while b != 0:
data = a & b
a = a ^ b
b = data << 1
return a
print(add_without_plus_operator(2, 10))
print(add_without_plus_operator(-20, 10))
print(add_without_plus_operator(-10, -20))

Write a Python program to check the priority of the four operators (+, -, *, /).

Write a Python program to check the priority of the four operators (+, -, *, /).

Example

Test.py 
						

# Code :

from collections import deque
import re

operators = "+-/*"
parenthesis = "()"
priority = {
'+': 0,
'-': 0,
'*': 1,
'/': 1,
}

def test_higher_priority(operator1, operator2):
return priority[operator1] >= priority[operator2]

print(test_higher_priority('*','-'))
print(test_higher_priority('+','-'))
print(test_higher_priority('+','*'))
print(test_higher_priority('+','/'))
print(test_higher_priority('*','/'))

Write a Python program to get the third side of right angled triangle from two given sides.

Write a Python program to get the third side of right angled triangle from two given sides.

Example

Test.py 
						

# Note: Use bitwise operations to add two numbers.

# Code:

def pythagoras(opposite_side,adjacent_side,hypotenuse):
if opposite_side == str("x"):
return ("Opposite = " + str(((hypotenuse**2) - (adjacent_side**2))**0.5))
elif adjacent_side == str("x"):
return ("Adjacent = " + str(((hypotenuse**2) - (opposite_side**2))**0.5))
elif hypotenuse == str("x"):
return ("Hypotenuse = " + str(((opposite_side**2) + (adjacent_side**2))**0.5))
else:
return "You know the answer!"

print(pythagoras(3,4,'x'))
print(pythagoras(3,'x',5))
print(pythagoras('x',4,5))
print(pythagoras(3,4,5))

Write a Python program to find the median among three given numbers.

Write a Python program to find the median among three given numbers.

Example

Test.py 
						

# code :

x = input("Input the first number")
y = input("Input the second number")
z = input("Input the third number")
print("Median of the above three numbers -")

if y < x and x < z:
print(x)
elif z < x and x < y:
print(x)

elif z < y and y < x:
print(y)
elif x < y and y < z:
print(y)

elif y < z and z < x:
print(z)    
elif x < z and z < y:
print(z)

Python Program to Find Armstrong Number in an Interval

Python Program to Find Armstrong Number in an Interval

Example

Test.py 
						

# Code:

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)

Python Program To Display Powers of 2 Using Anonymous Function

Python Program To Display Powers of 2 Using Anonymous Function

Example

Test.py 
						

# Code:

# 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])

Python Program to Find Numbers Divisible by Another Number

Python Program to Find Numbers Divisible by Another Number

Example

Test.py 
						

#Code:

# 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 to Binary, Octal and Hexadecimal

Python Program to Convert Decimal to Binary, Octal and Hexadecimal

Example

Test.py 
						

# Code:

# 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.")

Python Program to Make a Simple Calculator

Python Program to Make a Simple Calculator

Example

Test.py 
						

# Code:

# Program make a simple calculator

# 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'):
num1 = float(input("Enter first number: "))
num2 = float(input("Enter second number: "))

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))
break
else:
print("Invalid Input")

Python program to interchange first and last elements in a list

Python program to interchange first and last elements in a list

Example

Test.py 
						

# Examples:

# Input : [12, 35, 9, 56, 24]
# Output : [24, 35, 9, 56, 12]

# Input : [1, 2, 3]
# Output : [3, 2, 1]

# Code :

# Python3 program to swap first 
# and last element of a list 

# Swap function 
def swapList(newList): 
size = len(newList) 

# Swapping  
temp = newList[0] 
newList[0] = newList[size - 1] 
newList[size - 1] = temp 

return newList 

# Driver code 
newList = [12, 35, 9, 56, 24] 

print(swapList(newList))

Python program to swap two elements in a list

Python program to swap two elements in a list

Example

Test.py 
						

# Examples:

# Input : List = [23, 65, 19, 90], pos1 = 1, pos2 = 3
# Output : [19, 65, 23, 90]

# Input : List = [1, 2, 3, 4, 5], pos1 = 2, pos2 = 5
# Output : [1, 5, 3, 4, 2]

#Code :

# Python3 program to swap elements 
# at given positions 

# Swap function 
def swapPositions(list, pos1, pos2): 

list[pos1], list[pos2] = list[pos2], list[pos1] 
return list

# Driver function 
List = [23, 65, 19, 90] 
pos1, pos2  = 1, 3

print(swapPositions(List, pos1-1, pos2-1))

Python | Ways to find length of list

Python | Ways to find length of list

Example

Test.py 
						

# Code :

# Python code to demonstrate 
# length of list 
# using naive method 

# Initializing list  
test_list = [ 1, 4, 5, 7, 8 ] 

# Printing test_list 
print ("The list is : " + str(test_list)) 

# Finding length of list  
# using loop 
# Initializing counter 
counter = 0
for i in test_list: 

# incrementing counter 
counter = counter + 1

# Printing length of list  
print ("Length of list using naive method is : " + str(counter))

Check if element exists in list in Python

Check if element exists in list in Python

Example

Test.py 
						

# Code :

# Python code to demonstrate 
# checking of element existence 
# using loops and in 

# Initializing list  
test_list = [ 1, 6, 3, 5, 3, 4 ] 

print("Checking if 4 exists in list ( using loop ) : ") 

# Checking if 4 exists in list  
# using loop 
for i in test_list: 
if(i == 4) : 
print ("Element Exists") 

print("Checking if 4 exists in list ( using in ) : ") 

# Checking if 4 exists in list  
# using in 
if (4 in test_list): 
print ("Element Exists")

Python | Reversing a List

Python | Reversing a List

Example

Test.py 
						

# Examples:

# Input : list = [10, 11, 12, 13, 14, 15]
# Output : [15, 14, 13, 12, 11, 10]

# Input : list = [4, 5, 6, 7, 8, 9]
# Output : [9, 8, 7, 6, 5, 4]

# Code :

# Reversing a list using reversed() 
def Reverse(lst): 
return [ele for ele in reversed(lst)] 

# Driver Code 
lst = [10, 11, 12, 13, 14, 15] 
print(Reverse(lst))
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