PP R16 UNIT-4 AND UNIT-6

PYTHON PROGRAMMING UNIT-4

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Python Programing (R16) UNIT1-6

PP R16 UNIT-4 AND UNIT-6

netaji gandi Monday, September 23, 2019

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Python Programing (R16) UNIT1-6

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Python Programming (R16) UNIT-2

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Python Programing (R16) UNIT1-6

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netaji gandi Saturday, July 27, 2019

Python Programming (R16) UNIT-3

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Python Programing (R16) UNIT1-6

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Task :

Python program to for Bubble Sort

Time Complexity of Bubble Sort

Best Case	O(n)
Average Case	O(n2)
Worst Case	O(n2)

Algorithm:

Given a list L of n elements with values or records L0, L1, …, Ln-1, bubble sort is applied to sort the list L.

1. Compare first two elements L0, L1 in the list.
2. if L1 < L0, swap those elements and continue with next 2 elements.
3. Repeat the same step until whole the list is sorted, so no more swaps are possible.
4. Return the final sorted list.

def bubble_sort(sort_list):

    for j in range(len(sort_list)):

        for k in range(len(sort_list) - 1):

            if sort_list[k] > sort_list[k + 1]:

                sort_list[k], sort_list[k + 1] = sort_list[k + 1], sort_list[k]

    print(sort_list)

lst = []

size = int(input("Enter size of the list: \t"))

for i in range(size):

    elements = int(input("Enter the element: \t"))

    lst.append(elements)

bubble_sort(lst)

Python Programing (R16) UNIT1-6

netaji gandi Wednesday, July 24, 2019

Python Program For LCM of 2 numbers

Task

To find LCM of 2 numbers

Approach

• Read two input numbers using input().
• Find the minimum of 2 numbers, using min() function and store the value in numbers_min variable.
• Now run a while loop and check whether both numbers are divisible by the numbers_min variable which we got in the previous step.
  • if both numbers are divisible by numbers_min print the value as LCM and break the loop
  • if not, increment numbers_min value and continue while loop.

Program

num1 = int(input("Enter first number: \t"))

num2 = int(input("Enter second number: \t"))

 

numbers_min = min(num1, num2)

 

while(1):

    if(numbers_min % num1 == 0 and numbers_min % num2 == 0):

        print("LCM of two number is: ", numbers_min)

        break

    numbers_min += 1

OUTPUT:

Python Programing (R16) UNIT1-6

Python Program For LCM of 2 numbers

netaji gandi

Python Operators

Python Operators

In Python, an operator is a symbol used to perform arithmetical and logical operations. In other words, an operator can be defined as a symbol used to manipulate the value of an operand. Here, an operand is a value or variable on which the operator performs its task. For example, '+' is a symbol used to perform mathematical addition operation. 

Consider the expression a = 10 + 30 . Here, variable 'a', values '10' and '30' are known as Operands and the symbols '=' and '+' are known as Operators.

Types of Operators in Python

In Python, there is a rich set of operators, and they are classified as follows.

1. Arithmetic Operators ( +, -, *, /, %, **, // )
2. Assignment Operators ( =, +=, -=, *=, /=, %=, **=, //= )
3. Comparison Operators ( <, <=, >, >=, ==, != )
4. Logical Operators ( and, or, not )
5. Identity Operators ( is, is not )
6. Membership Operators ( in, not in )
7. Bitwise Operators ( &, |, ^, ~, <<, >> )

Let's look at each type of operators in Python.

Arithmetic Operators in Python

In Python, the arithmetic operators are the operators used to perform a basic arithmetic operation between two variables or two values. The following table presents the list of arithmetic operations in Python along with their description.

To understand the example let's consider two variables a with value 10 and b with value 3.

Operator	Meaning	Description	Example
+	Addition	Performs mathematical addition on both side of the operator	a + b = 13
-	Subtraction	Subtracts the right-hand operand from the left-hand operand	a - b = 7
*	Multiplication	Multiplies values on both sides of the operator	a * b = 30
/	Division	Performs division by Dividing left-hand operand by right-hand operand	a / b = 3.3333333333333335
%	Modulus	Performs division by Dividing left-hand operand by right-hand operand and returns remainder	a % b = 1
**	Exponent	Performs exponential (power) calculation on operators	a ** b = 1000
//	Floor Division	Performs division which the digits after the decimal point are removed. But if one of the operands is negative, the result is rounded away from zero (towards negative infinity)	a // b = 3

Let's look at the following example code to illustration the arithmetic operators in Python.

Assignment Operators in Python

In Python, the assignment operators are the operators used to assign the right-hand side value to the left-hand side variable. The following table presents the list of assignment operations in Python along with their description.

To understand the example let's consider two variables a with value 10 and b with value 3.

Operator	Meaning	Description	Example
=	Assignment	Assigns right-hand side value to left-hand side variable	a = 10
+=	Add and Assign	Adds right operand to the left operand and assign the result to left operand	a += b ≈ ( a = a + b )
-=	Subtract and Assign	Subtracts right operand from the left operand and assign the result to left operand	a -= b ≈ ( a = a - b )
*=	Multiply and Assign	Multiplies right operand with the left operand and assign the result to left operand	a *= b ≈ ( a = a * b )
/=	Division and Assign	Divides left operand with the right operand and assign the result to left operand	a /= b ≈ ( a = a / b )
%=	Modulus and Assign	Takes modulus using two operands and assign the result to left operand	a %= b ≈ ( a = a % b )
**=	Exponent and Assign	Performs exponential calculation on operators and assign value to the left operand	a **= b ≈ ( a = a ** b )
//=	Floor Division and Assign	Performs floor division on operators and assign value to the left operand	a //= b ≈ ( a = a // b )

Let's look at the following example code to illustration the assignment operators in Python.

Comparison Operators in Python

In Python, the comparison operators are used to compare two values. In other words, comparison operators are used to checking the relationship between two variables or values. The comparison operators are also known as Relational Operators. The following table presents the list of comparison operations in Python along with their description.

To understand the example let's consider two variables a with value 10 and b with value 3.

Operator	Meaning	Description	Example
<	Less than	Returns True if left-hand side value is smaller than right-hand side value, otherwise returns False.	a < b (False)
<=	Less than or Equal to	Returns True if left-hand side value is smaller than or equal to right-hand side value, otherwise returns False.	a <= b ( False )
>	Greater than	Returns True if left-hand side value is larger than right-hand side value, otherwise returns False.	a > b ( True )
>=	Graeter than or Equal to	Returns True if left-hand side value is larger than or equal to right-hand side value, otherwise returns False.	a >= b ( True )
==	Equal to	Returns True if left-hand side value is equal to right-hand side value, otherwise returns False.	a == b ( False )
!=	Not equal to	Returns True if left-hand side value is not equal to right-hand side value, otherwise returns False.	a != b ( True )

Let's look at the following example code to illustration the comparison operators in Python.

Logical Operators in Python

In Python, the logical operators are used to merge multiple conditions into a single condition. The following table presents the list of logical operations in Python along with their description.

To understand the example let's consider two variables a with value 10 and b with value 3.

Operator	Meaning	Description	Example
and	Logical AND	Returns True if all the conditions are True, otherwise returns False.	a < b and a > c
or	Logical OR	Returns False if all the conditions are False, otherwise returns True.	a < b or a > c
not	Logical NOT	Returns True if the condition is False, otherwise returns False.	not a > b

Let's look at the following example code to illustration the logical operators in Python.

Identity Operators in Python

In Python, the identity operators are used to compare the memory locations of two objects or variables. There are two identity operators in Python. The following table presents the list of identity operations in Python along with their description.

To understand the example let's consider two variables a with value 10 and b with value 3.

Operator	Meaning	Description	Example
is	is identical	Returns True if the variables on either side of the operator point to the same object, otherwise returns False.	a is b
is not	is not identical	Returns False if the variables on either side of the operator point to the same object, otherwise returns True.	a is not b

Let's look at the following example code to illustration the identity operators in Python.

Membership Operators in Python

In Python, the membership operators are used to test whether a value is present in a sequence. Here the sequence may be String, List, or Tuple. There are two membership operators in Python. The following table presents the list of membership operations in Python along with their description.

To understand the example let's consider two variables a with value 10, b with value 3, and a list [1, 4, 10, 40, 5].

Operator	Meaning	Description	Example
in	in	Returns True if it finds a variable in the specified sequence, otherwise returns False.	a in list
not in	not in	Returns True if it does not finds a variable in the specified sequence, otherwise returns False.	a not in list

Let's look at the following example code to illustration the membership operators in Python.

Bitwise Operators in Python

In Python, the bitwise operators are used to performs bit by bit operation. There are six bitwise operators in Python. The following table presents the list of bitwise operations in Python along with their description.

To understand the example let's consider two variables a with value 10 equalent binary value is 1010, b with value 15 equalent binary value is 1111.

Operator	Meaning	Description	Example
&	Bitwise AND	Returns True if it finds a variable in the specified sequence, otherwise returns False.	a in list
|	Bitwise OR	Returns True if it does not finds a variable in the specified sequence, otherwise returns False.	a not in list
^	Bitwise Exclusive OR	Returns True if it does not finds a variable in the specified sequence, otherwise returns False.	a not in list
~	Bitwise Ones Complement	Returns True if it does not finds a variable in the specified sequence, otherwise returns False.	a not in list
<<	Bitwise Left Shift	Returns True if it does not finds a variable in the specified sequence, otherwise returns False.	a not in list
>>	Bitwise Right Shift	Returns True if it does not finds a variable in the specified sequence, otherwise returns False.	a not in list

Let's look at the following example code to illustration the bitwise operators in Python.

Python Programing (R16) UNIT1-6

Python Operators

netaji gandi